The Sentinel - Season 3 Episode 21 -

Jim's friend U.S. Marshall Roger Corman is killed in a car bombing before he can reveal a corrupt marshall that he's uncovered. Only by going undercover can Jim hope to glimpse what is hidden, after the U.S. Marshalls take over the investigation. Jim, Captain Banks, Blair, and Megan Connor, the newest addition to the Sentinel team, conduct their own neighborhood watch.