Aliens on a mission of conquest hold the crew captive.
When the gang's hidden cache of money - needed to purchase a secret map - goes up in smoke, the men of Stalag 13 must come up with a way to replace the cash - and decide to pull off a bank heist in the nearby town.
Klink nabs a spy, so Hogan takes the focus off his catch by making Klink think someone's trying to kill the commandant himself, leading Klink to have Hogan become a decoy commandant.
There is turmoil after the death of Adam York, publisher of the Los Angeles Chronicle newspaper.
Planting a fuel depot right outside Stalag 13, a German general is tempting Hogan. Marya the White Russian also shows up again.
