After Nancy discovers a murdered homeless man, Mannion notices that the body has a distinct military tattoo. He identifies the man as a former Marine believed to have been held prisoner in a Vietnamese camp. They soon learn that the victim may have been one of many POW's who were returned to the United States in the 1980s after the government stated that there were no prisoners left in Vietnam. Now, as Mannion delves further into the case, he must battle the demons that continue to haunt him from the time he spent in Vietnam. (from CBS)

The third-season opener picks up where the sophomore year ended, with Mannion struggling for his life after being shot on his boat and falling overboard into the Potomac River. As he tries to pull himself ashore, his would-be assassin — the daughter of a Russian mobster — flees the scene and is hit by a car. While the accident brings to light the fact that Mannion is missing, the chief keeps his survival a secret so he can figure out who's behind the shooting. Deputy chief Noland is immediately pressured to solve the case by an aggressive U.S. attorney general, while a new press secretary tries to keep matters from spinning out of control.

Mannion, who is presumed to be dead, pops up in Paris to follow the Government official he believes is behind the attempt on his life. Back in Washington, D.C., Temple is stopped for speeding and an officer finds cocaine in the car, but Temple claims the drugs are evidence he obtained at a crime scene and forgot to turn in.