Here's some more info about
6.15 "The Formula":
~ The episode starts at a Grand Prix race exhibition - it's not actually a race, but Davi dos Santos is still being competitive. His wife, Tania, seems worried that he's being too reckless, but he wants to win - and to please the crowd.
~ Santos drives for Seraphim Spirits, and a lot of the fans are wearing shirts to advertise the brand. They're all cheering for Santos.
~ During a pit stop, Santos' crew chief urges him to back down because it's just an exhibition, but Santos says it's all the same to him. On the way out of the pits, Santos' car explodes.
~ Mac meets with Flack on the track - Santos is in intensive care, and it doesn't look good. The have to figure out what happened and who is responsible for Santos' injuries.
~ The car was covered with gasoline, but Danny and Adam determine that the gas tank itself is undamaged - someone must have cut the fuel line.
~ The team has a list of suspects to deal with, including competitors and someone who sent threatening letters to Santos. They are able to identify the man who sent the letters as Joseph Weaver - he's been making phone calls, filing lawsuits and sending letters to Congress because of Seraphim Spirits. He says the company is encouraging people to drink and drive - his own brother was killed by a drunk driver who had been drinking Seraphim Spirits.
~ As the team tries to unravel the mystery of who sabotaged Santos' car, things take a turn for the worse in the hospital - if Santos doesn't pull through, their suspect will be facing a murder charge.
~ Also, in more fun news, it seems that Mac and Stella are wearing racing uniforms toward the end of the episode - I don't know for sure, but it looks like Mac might have come up with the idea to go for a drive at the track.