(Grissom is walking away from the site and dialing his cell phone.)
CATHERINE: (from phone) This is Catherine.
GRISSOM: (to phone) It's Gil. How you doing?
CATHERINE: (from phone) I'm busy. Checking up on me?
GRISSOM: (to phone) Why would I need to do that?
CATHERINE: (from phone) You tell me.
GRISSOM: (to phone) Look, I know you tend to get a little territorial about your crime scenes, and I don't want there to be any tension between us, so I'm giving you fair warning.
(Grissom stops when he sees the tire treadmarks on the asphalt.)
CATHERINE: (from phone) Fair warning for what?
GRISSOM: (to phone) You're at 7888 Oakey Street. Am I right?
(Catherine is kneeling down next to a dead body in the parking lot.)
GRISSOM: (from phone) Hi.
(She looks up and sees Grissom. He smiles and waves his cell phone at her.)