It was originally transmitted on Wednesday 28 August 1968, one week later than planned, due to the Warsaw Pact Invasion of Czechoslovakia.
A stranger with a suspicious foreign accent convinces Mainwairing's men that he is a Polish officer serving with GHQ who has come to inform them of a £10 reward for every Nazi arrested.
While on night patrol, Jones' section capture two German airmen, but Private Godfrey complicates matters by allowing them to escape while they visit the lavatory.
Jones, Walker and Pike catch two, who escape and are caught by Winogrodzki, who announces his intention to claim the bounty for himself.
In the radio version of the episode, only one German airman is captured and only £20 bounty is due after Walker persuades the MPs to additionally take Winogrodzki.