The Big Bang Theory

SHELDON AND BERNADETTE SPEND A NIGHT HANGING OUT TOGETHER WHILE THE REST OF THE GANG GOES TO A WINE TASTING, ON "THE BIG BANG THEORY," THURSDAY, APRIL 28

Sheldon shows Bernadette his train (!) collection

"The Fermentation Bifurcation" – The gang goes to a wine bar and runs into Penny's old boyfriend, Zack (Brian Thomas Smith). Also, Bernadette gets stuck spending the evening with Sheldon when she can't go wine tasting with the group, and things don't go as planned when Koothrappali introduces his new girlfriend, Claire (Alessandra Torresani), on THE BIG BANG THEORY, Thursday, April 28 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

CHEAT TWEET: The rest of the gang goes wine tasting while Sheldon & Bernadette spend time together @BigBangTheory 4/28 8pm http://bit.ly/1TtpdxQ

REGULAR CAST
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Brian Thomas Smith (Zach)
Alessandra Torresani (Claire)

WRITTEN BY: Steven Molaro, Jim Reynolds, Anthony Del Broccolo
TELEPLAY BY: Chuck Lorre, Steve Holland, Tara Hernandez
DIRECTED BY: Nikki Lorre
 
PENNY STRUGGLES TO BOND WITH LEONARD'S MOTHER WHEN SHE COMES FOR A VISIT, ON "THE BIG BANG THEORY," THURSDAY, MAY 5

Christine Baranksi (The Good Wife) Returns As Leonard's Mother, Beverly

Will Penny bond with Leonard's mom when she comes to visit?

"The Line Substitution Solution" – Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly (Christine Baranski), comes to town and Penny struggles to make a connection with her, on THE BIG BANG THEORY, Thursday, May 5 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

CHEAT TWEET: Mother-in-Law trouble? Penny struggles 2 bond w/ Leonard's mother. #ChristineBaranski returns! @BigBangTheory 5/5 8pm http://bit.ly/1YSvsg0

REGULAR CAST
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart)
Christine Baranski (Beverly)

GUEST CAST:
Blake Anderson (Trevor)
Amanda Payton (Ainsley)

WRITTEN BY: Steve Holland & Saladin K. Patterson & Tara Hernandez
TELEPLAY BY: Steven Molaro & Eric Kaplan & Maria Ferrari
DIRECTED BY: Anthony Rich
 
CHAOS ENSUES WHEN LEONARD'S RECENTLY DIVORCED PARENTS AND SHELDON'S DEVOUTLY RELIGIOUS MOTHER COMES TO TOWN, ON THE NINTH SEASON FINALE OF "THE BIG BANG THEORY," THURSDAY, MAY 12

The family is all together, but can they get along?

Emmy Award Winner Judd Hirsch Guest Stars as Leonard's Father, Alfred

Christine Baranksi Returns as Leonard's Mother, Beverly and Laurie Metcalf Returns as Sheldon's Mother, Mary

"The Convergence Convergence" - Chaos ensues when Leonard's recently divorced parents, Alfred (Judd Hirsch) and Beverly (Christine Baranski), and Sheldon's devoutly religious mother, Mary (Laurie Metcalf), come to town. Also, Wolowitz and Koothrappali think the government is out to get them when they are contacted about their guidance system, on the ninth season finale of THE BIG BANG THEORY, Thursday, May 12 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

CHEAT TWEET: The parents come 2 town! @JuddHirsch #ChristineBaranski & #LaurieMetcalf guest star! #Season9Finale @BigBangTheory 5/12 8pm http://bit.ly/1QOlIha

REGULAR CAST
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Christine Baranski (Beverly)
Laurie Metcalf (Mary)

GUEST CAST:
Judd Hirsch (Alfred)
Marcus Folmar (Police Officer)

WRITTEN BY: Steven Molaro & Tara Hernandez & Adam Faberman
TELEPLAY BY: Chuck Lorre & Steve Holland & Jeremy Howe
DIRECTED BY: Mark Cendrowski
 
THE BIG BANG THEORY

Leonard and Sheldon are brilliant physicists – geniuses in the laboratory but socially challenged everywhere else. Enter beautiful, street-smart neighbor Penny, who aims to teach them a thing or two about life. Despite their on-again, off-again relationship in the past, Leonard and Penny have finally gotten married. Even Sheldon has found a female companion, entering into a "relationship agreement" with neurobiologist Amy Farrah Fowler, and they recently took their relationship to the next level. In their free time, Leonard and Sheldon enjoy fantasy role-playing games with their ever-expanding universe of friends, including fellow scientists Koothrappali, Wolowitz and Wolowitz's adorable microbiologist wife, Bernadette, who is now expecting their first child.

Begins its 10th season Monday, Sept. 19 (8:00-8:30 PM, ET/PT). Moves to its regular time period, Thursdays (8:00-8:30 PM, ET/PT), on October 27, on the CBS Television Network.

ORIGINAL PREMIERE DATE: September 24, 2007
ORIGINATION: Los Angeles
FORMAT: Comedy (HD)

STARRING: Johnny Galecki (Leonard Hofstadter)
Jim Parsons (Sheldon Cooper)
Kaley Cuoco (Penny)
Simon Helberg (Howard Wolowitz)
Kunal Nayyar (Rajesh Koothrappali)
Mayim Bialik (Amy Farrah Fowler)
Melissa Rauch (Bernadette Rostenkowski)

PRODUCED BY: Chuck Lorre Productions, Inc., in association with Warner Bros. Television
CO-CREATORS: Chuck Lorre and Bill Prady
EXECUTIVE PRODUCERS: Chuck Lorre, Bill Prady, Steven Molaro

Photos are available at: http://cbspressexpress.com
Official CBS Website: http://www.cbs.com/bigbangtheory
Facebook: https://www.facebook.com/TheBigBangTheory
Twitter: http://twitter.com/BigBangTheory
Instagram: BigBangTheory_CBS
CBS Tweet: https://twitter.com/CBSTweet

Cast on Twitter:
Simon Helberg @simonhelberg
Kunal Nayyar @kunalnayyar
Mayim Bialik @missmayim
Melissa Rauch @melissarauch

Cast on Instagram:
Jim Parsons @therealjimparsons
Johnny Galecki @sanctionedjohnnygalecki
Kaley Cuoco @normancook
Kunal Nayyar @kunalkarmanayyar
Mayim Bialik @missmayim
Melissa Rauch @themelissarauch

AFTER SHELDON'S MOTHER AND LEONARD'S FATHER SHARE AN EVENING TOGETHER, EVERYONE DEALS WITH AN AWKWARD MORNING THE NEXT DAY, ON THE 10th SEASON PREMIERE OF "THE BIG BANG THEORY," MONDAY, SEPT. 19

Editor's note: The air time of this episode has changed.

Guest Stars Include Katey Sagal as Penny's Mother, Jack McBrayer as Penny's Brother and Dean Norris as Air Force Representative Colonel Williams

Christine Baranski, Laurie Metcalf, Judd Hirsch and Keith Carradine Return

"The Conjugal Conjecture" – After Sheldon's mother and Leonard's father share an evening together, everyone deals with an awkward morning the next day. Also, Penny's family arrives for the wedding ceremony, including her anxiety-ridden mother, Susan (Katey Sagal), and her drug dealing brother, Randall (Jack McBrayer), on the 10th Season Premiere of THE BIG BANG THEORY, Monday, Sept. 19 (8:00-8:30 PM, ET/PT), on the CBS Television Network. Dean Norris guest stars as Colonel Williams, an Air Force Representative from the Department of Materiel Command. Christine Baranski, Laurie Metcalf, Judd Hirsch and Keith Carradine return.

CHEAT TWEET: Meet Penny's mother & brother on the 10th season premiere of @BigBangTheory #CBS 9/19 8pm @KateySagal #JackMcBrayer http://bit.ly/2bQVbUm

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart)
Christine Baranski (Beverly)
Laurie Metcalf (Mary)
Judd Hirsch (Alfred)
Keith Carradine (Wyatt)
Katey Sagal (Susan)
Jack McBrayer (Randall)
Dean Norris (Colonel Williams)

STORY BY: Chuck Lorre, Steve Holland, Tara Hernandez
TELEPLAY BY: Steve Molaro, Eric Kaplan, Jim Reynolds
DIRECTED BY: Mark Cendrowski
 
AIR FORCE REPRESENTATIVE COLONEL WILLIAMS SITS DOWN TO TALK WITH WOLOWITZ, ON "THE BIG BANG THEORY," MONDAY, SEPT. 26

Dean Norris Returns as Colonel Williams

"The Military Miniaturization" – Colonel Williams (Dean Norris), an Air Force representative from the Department of Material Command sits down to talk with Wolowitz, on THE BIG BANG THEORY, Monday, Sept. 26 (8:00-8:31 PM, ET/PT), on the CBS Television Network.

CHEAT TWEET: @deanjnorris returns as Colonel Williams on a new @BigBangTheory #CBS 9/26 8pm http://bit.ly/2cZeSON

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Dean Norris (Colonel Williams)

GUEST CAST:
Josh Zuckerman (Marty)

STORY BY: Chuck Lorre, Eric Kaplan, Jim Reynolds
TELEPLAY BY: Steve Molaro, Steve Holland, Maria Ferrari
DIRECTED BY: Mark Cendrowski
 
TENSIONS RISE WHEN THE BOYS STRUGGLE TO COMPLETE THEIR GOVERNMENT PROJECT ON TIME, ON "THE BIG BANG THEORY," MONDAY, OCT. 3

Will the guys finish their gov't project?

Dean Norris Returns as Air Force Representative Colonel Williams

"The Dependence Transcendence" – Tensions rise when the boys struggle to complete their government project on time and Sheldon tries an energy drink to stay awake. Also, Penny and Amy go to a "party" at Bert (Brian Posehn) the geologist's house, and Kooothrappali learns Bernadette's true feelings about her pregnancy when they clean out the future baby room, on THE BIG BANG THEORY, Monday, Oct. 3 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Dean Norris returns as Air Force Representative Colonel Williams.

CHEAT TWEET: Tensions rise when the boys struggle to complete their classified government project @BigBangTheory #CBS 10/3 8pm http://bit.ly/2dlX6p7

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Brian George (Dr. Koothrappali)
Dean Norris (Colonel Williams)

GUEST CAST:
Brian Posehn (Bert)
Brandon Jones (Superhero)

STORY BY: Steven Molaro, Saladin K. Patterson, Tara Hernandez
TELEPLAY BY: Steve Holland, Maria Ferrari, Jeremy Howe

DIRECTED BY: Mark Cendrowski
 
SHELDON AND AMY MOVE IN TOGETHER, ON "THE BIG BANG THEORY," MONDAY, OCT. 10

"The Cohabitation Experimentation" – When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Also, Howard and Bernadette are upset when Koothrappali learns the gender of the baby before they do, on THE BIG BANG THEORY, Monday, Oct. 10 (8:00-8:31 PM, ET/PT), on the CBS Television Network.

CHEAT TWEET: Time to pack! After Amy's apartment floods, Sheldon & Amy decide to move in together! @BigBangTheory #CBS 10/10 8pm http://bit.ly/2dy9ItF

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

STORY BY: Chuck Lorre, Dave Goetsch, Maria Ferrari
TELEPLAY BY: Steven Molaro, Steve Holland, Tara Hernandez
DIRECTED BY: Mark Cendrowski
 
SHELDON THREATENS TO BREAK OFF THEIR RELATIONSHIP WHEN AMY REFUSES TO ADHERE TO THE BATHROOM SCHEDULE, ON "THE BIG BANG THEORY," MONDAY, OCT. 17

Amy & Sheldon fight over bathroom "rules"!!! :eek:

"The Hot Tub Contamination" – Leonard and Penny must separate a quarreling Sheldon and Amy when their cohabitation does not go as planned, and Sheldon threatens to break off their relationship when Amy refuses to adhere to the bathroom schedule. Also, Howard and Bernadette find unexpected guests at their house when they decide to stay home from a planned vacation, on THE BIG BANG THEORY, Monday, Oct. 17 (8:00-8:31 PM, ET/PT), on the CBS Television Network.

CHEAT TWEET: Sheldon & Amy's cohabitation doesn't go as planned so Leonard & Penny intervene. @BigBangTheory #CBS 10/17 8pm http://bit.ly/2dW6jFa

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart)

STORY BY: Chuck Lorre, Maria Ferrari, Tara Hernandez
TELEPLAY BY: Steve Holland, Eric Kaplan, Jim Reynolds
DIRECTED BY: Mark Cendrowski
 
PENNY IS INVITED TO APPEAR AT A LOCAL COMIC CON FOR HER ROLE IN "SERIAL APE-IST," AND LEONARD CONVINCES HER TO ATTEND, WHEN "THE BIG BANG THEORY" MOVES TO ITS REGULAR TIME PERIOD, THURSDAY, OCT. 27, AT 8:00 PM

Editor's note: The air time of this episode has changed.

"The Fetal Kick Catalyst" – Penny is surprised to learn she has fans of her performance in "Serial Ape-ist" when she attends Van Nuys Comic Con with Leonard. Also, Amy hosts a Sheldon-style brunch at Penny's apartment, and Wolowitz makes an impulsive purchase when he starts stressing out about the baby on the way, when THE BIG BANG THEORY moves to its regular time period, Thursday, Oct. 27 (8:00-8:30 PM, ET/PT), on the CBS Television Network.

CHEAT TWEET: Mimosas anyone? Amy & Sheldon host their first brunch in Penny's apartment on @BigBangTheory #CBS Thursday 10/27 8pm http://bit.ly/2enyLxg

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart)
Brian Posehn (Bert)

GUEST CAST:
Michelle Arthur (Mrs. Petrescu)
Joshua Banday (Nolan)
Bryan Safi (Daniel)
Tucker Albrizzi (Christopher)
Jareb Dauplaise (Jeff)

STORY BY: Steve Holland, Tara Hernandez, Jeremy Howe
TELEPLAY BY: Steve Molaro, Saladin K. Patterson, Anthony Del Broccolo
DIRECTED BY: Mark Cendrowski
 
IN ORDER TO CONTINUE LIVING WITH SHELDON, AMY LIES TO HIM ABOUT REPAIRS BEING MADE TO HER APARTMENT, ON "THE BIG BANG THEORY," THURSDAY, NOV. 3

Amy & Sheldon make their presentation!

"The Veracity Elasticity" – In order to continue living with Sheldon, Amy lies to him about repairs being made to her apartment and they host an "on location" episode of "Fun With Flags" in Penny's apartment. Also, Leonard lets Penny decorate Sheldon's old room after he learns that she has been secretly moving Leonard's collectibles into storage, on THE BIG BANG THEORY, Thursday, Nov. 3 (8:00-8:31 PM, ET/PT), on the CBS Television Network.

CHEAT TWEET: Sheldon & Amy present "Fun With Flags" from Penny's place where they are temporarily living @BigBangTheory #CBS 11/3 8pm http://bit.ly/2fc0P9Y

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

STORY BY: Steve Molaro, Eric Kaplan, Maria Ferrari
TELEPLAY BY: Steve Holland, Jim Reynolds, Adam Faberman
DIRECTED BY: Mark Cendrowski
 
SHELDON TELLS AMY HE WANTS TO MAKE A BABY WITH HER, ON "THE BIG BANG THEORY," THURSDAY, NOV. 10

"The Brain Bowl Incubation" – After a successful experiment combining their genes, Sheldon will stop at nothing to convince Amy they should procreate. Also, Koothrappali is embarrassed to tell the gang what the new woman he's dating does for a living, on THE BIG BANG THEORY, Thursday, Nov. 10 (8:00-8:31 PM, ET/PT), on the CBS Television Network.

CHEAT TWEET: Sheldon tells Amy he wants to make a baby with her on @BigBangTheory #CBS 11/10 @8PM http://bit.ly/2ffJ3zn

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

GUEST CAST:
Maria Canals-Barrera (Issabella)

STORY BY: Chuck Lorre, Steve Holland, Saladin K. Patterson
TELEPLAY BY: Steve Molaro, Maria Ferrari, Tara Hernandez
DIRECTED BY: Mark Cendrowski
 
SHELDON STRUGGLES TO CONTAIN HIS JEALOUSY WHEN A CO-WORKER WINS AN AWARD, ON "THE BIG BANG THEORY," THURSDAY, NOV. 17

Stephen Hawking Returns to Guest Star as Himself

"The Geology Elevation" – When Bert (Brian Posehn), a Caltech geologist, wins the MacArthur Genius fellowship, Sheldon is overcome with jealousy. Also, Wolowitz finds an old remote control Stephen Hawking action figure he invented, on THE BIG BANG THEORY, Thursday, Nov. 17 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Stephen Hawking returns to guest star as himself.

CHEAT TWEET: Sheldon is overcome w/ jealousy when a co-worker wins an award. #StephenHawking returns @BigBangTheory #CBS 11/17 @8PM http://bit.ly/2fxhGke

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
John Ross Bowie (Kripke)
Brian Posehn (Bert)
Stephen Hawking (Himself)

GUEST CAST:
Kunal Dudheker (Tour Guide)

STORY BY: Chuck Lorre, Erik Kaplan, Maria Ferrari
TELEPLAY BY: Steve Holland, Jim Reynolds, Jeremy Howe
DIRECTED BY: Mark Cendrowski
 
A BATTLE ENSUES WHEN SHELDON AND LEONARD ARGUE OVER WHO WILL GET CUSTODY OF THEIR SHARED BELONGINGS, ON "THE BIG BANG THEORY," THURSDAY, DEC. 1

Christopher Lloyd Guest Stars as Theodore

"The Property Division Collision"– Sheldon and Leonard try to divvy up their shared belongings, but can't agree on anything. Also, Koothrappali and Stuart fight to be the most helpful during Bernadette's final weeks of pregnancy, on THE BIG BANG THEORY, Thursday, Dec. 1 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Christopher Lloyd guest stars as Theodore.

CHEAT TWEET: Sheldon & Leonard battle over their shared belongings. #ChristopherLloyd guests @BigBangTheory #CBS 12/1 @8PM http://bit.ly/2gDatzf

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart)

GUEST CAST:
Christopher Lloyd (Theodore)

STORY BY: Steve Holland, Bill Prady, Steve Goetsch
TELEPLAY BY: Steve Molaro, Maria Ferrari, Tara Hernandez
DIRECTED BY: Mark Cendrowski
 
HOWARD AND BERNADETTE WELCOME THEIR NEW BABY, ON "THE BIG BANG THEORY," THURSDAY, DEC. 15

Baby Wolowitz has arrived!

"The Birthday Synchronicity"– Howard and Bernadette welcome their new baby and Sheldon and Amy celebrate Amy's birthday, on THE BIG BANG THEORY, Thursday, Dec. 15 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

CHEAT TWEET: Baby Wolowitz is finally here! And Happy Birthday to Amy! @BigBangTheory #CBS 12/15 @8PM http://bit.ly/2hnv8aP

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart)
Vernee Watson (Althea)

GUEST CAST:
Pamela Adlon (Halley)

STORY BY: Chuck Lorre, Steve Holland, Maria Ferrari
TELEPLAY BY: Steve Molaro, Eric Kaplan, Tara Hernandez
DIRECTED BY: Nikki Lorre
 
SHELDON AND AMY VISIT LEONARD AND PENNY FOR THE FIRST TIME SINCE THE HOLIDAYS AND SHARE DETAILS ABOUT THEIR TERRIBLE TRIP TO TEXAS, ON "THE BIG BANG THEORY," THURSDAY, JAN. 5, 2017

Sheldon's mom gets the details of his Terrible Texas Trip with Amy!

Laurie Metcalf Returns as Sheldon's Mother, Mary

"The Holiday Summation" – Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas, on THE BIG BANG THEORY, Thursday, Jan. 5, 2017 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Laurie Metcalf returns as Sheldon's mother, Mary.

CHEAT TWEET: Sheldon & Amy share details about their holiday trip to Texas. #LaurieMetcalf returns @BigBangTheory #CBS 1/5 @8PM http://bit.ly/2hBbGK5

REGULAR CAST:
Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:
Kevin Sussman (Stuart Bloom)
Laurie Metcalf (Mary Cooper)

GUEST CAST:
Pamela Adlon (Halley Wolowitz, O.S.)

STORY BY: Steve Molaro, Eric Kaplan, Tara Hernandez
TELEPLAY BY: Steve Holland, Maria Ferrari, Jeremy Howe
DIRECTED BY: Mark Cendrowski
 
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