Third Watch (1999)

S6E10 Rat Bastard

Ty betrays Sasha to the team after Finney declines to transfer her. Meanwhile, an action movie star, researching for his upcoming role, joins the firefighters for a ride along. Stu quickly realizes that his childhood idol is actually a struggling alcoholic desperate to revive his stalled career. When everyone else turns down the chance, Brendan volunteers to ride with Sasha, leaving Ty and Sully as partners again. Tragedy strikes when a retired detective, who provided Sasha with crucial information about Ty's father's death, is found shot dead. Sully chooses to testify against Finney. While chasing a drug dealer responsible for an eight-year-old girl's shooting, Sasha and Brendan get injured, and their calls for help go unanswered until Ty and Sully finally step in.