Death of a Cracksman (S01E10)

Alfie Mullins, a prisoner who has not returned but poses no real threat, is an old-school safe-cracker. As he is heading back to prison, a gang of thieves approaches him, seeking his expertise to crack a safe they’ve stolen. Unfortunately, during their conversation, Alfie meets an untimely death. The safe is booby-trapped to detonate remotely, and P.C. Carver inadvertently triggers the explosion when he uses his radio.