"A Reasonable Man" is the 65th episode of Casualty and the 13th episode of the 5th series.
A schizophrenic man arrives after a road accident but it transpires he has murdered his wife's friend. He panics at the sight of a policeman and pulls a gun from a briefcase, taking Megan hostage in CRASH. He insists that a porter (Charlie in Jimmy's uniform) takes out a dead body on a trolley. Megan stays calm but the police and the man's wife's shouts make him panic and fire the gun, wounding Charlie in the chest.