What's inside a visiting German general's briefcase --- the one that's chained to his wrist? The mystery becomes too tempting for Hogan. who not only wants to photograph the case's contents, but then sneak the photos out of Stalag 13 as well!

When a heavily guarded "water" truck appears one day and is parked inside the camp, Hogan and his men decide to find out just what kind of cargo the vehicle actually contains.

LeBeau aids in the escape of a captured French scientist and his daughter, who are able to make it out of Germany. But now the men of Stalag 13 must find a suitable "replacement" scientist who can present and discuss the study's findings.

The Germans' plan to build a synthetic fuel plant at Stalag 13 would spell disaster for Hogan's men and their important strategic subterfuge. So Hogan attempts to convince Klink that there's a massice oil supply under the camp --- and orders a phony Allied air raid on the camp as proof!

When a British submarine cannot make a planned rendezvous to pick up a POW carrying an example of an important new German weapon, Hogan must come up with a sturdy, seaworthy replacement. Can he convince Colonel Klink to construct the camp's new officer's club in the form of a yacht?

A new prisoner reveals that a local bank nearby houses a shipment of gold stolen from the Bank of France by the Germans. When Hogan hears of the glittering cash, he decides it would be only proper to steal it back --- and return it to France after the war!

Hogan is enthusiastic about joining forces with an underground unit that is targeting a local railway tunnel --- unaware that the "saboteurs" are actually Gestapo agents masquerading as allies!

Hogan's plan to destroy a mobile Nazi anti-aircraft battery is hampered by Colonel Klink's power-hungry peer, Major Kuehn.

Colonel Klink's happy reunion with an old military buddy ends abruptly when the man is arrested by the Gestapo. Will Klink end up in the clink as well?

The men of Stalag 13 have no interest in tunneling into a neighboring barracks that houses new prisoners --- until they discover that the new detainees are women!

Colonel Klink is desperate after General Burkhalter plays matchmaker and pairs Klink with the general's monstrous sister, Gertude. Can Hogan deflect some of the Cupid's flying arrows away for the hapless, helpless Klink?

Somewhere along the elaborate, intricate underground escape route there is a disastrous weak link, Determined to find it, Hogan, Newkirk and Lebeau decide to break out of Stalag 13 by following the escape route themselves.

A secret military document is mistakenly hidden in Colonel Klink's topcoat at a party, and a desperate Hogan must nab the document because of both its value to the allies and because Klink will be charged with treason and replaced at Stalag 13 if it is discovered in his possession.

To get the inside secrets of a Nazi chemical warfare facility, Hogan and his cohorts must convince the Germans that Carter has turned traitor and wishes to defect to the Third Reich.