Season 5 · Episode 19

And Then There Was One

• Release date
• January 20, 1972
• Runtime
• 60 min

A military-issue fragmentation grenade is used in an attack on two Vietnam veterans, one of whom - a friend of Mark's - is killed. When it transpires that another of the pair's old unit has come under similar attack, the Chief sets out to trap the killer, using Ed in a cunning disguise as bait.