Crittendon interferes as Hogan tries to help a scientist, whom they were ordered to kill, try to defect.
A group of underground operatives that Hogan and his team begin working with is actually a group led by a Gestapo captain who's set on capturing them.
The guys plan to destroy a gun emplacement so the Allies can attack on Hitler's birthday.
Hogan creates an officer's club in the shape of a ship in order to get a gunsight and a British POW to England.
When Hogan tries to arrange the unscheduled escape of twenty men, his mission is complicated when a captured sergeant jumps the gun.
Hogan convinces Klink that there is oil underneath the camp in order to discourage the Germans from building a synthetic fuel plant there.
Hogan visits a local Hofbrau to get the plans to a German army division that is camping out nearby.
LeBeau pretends to be a famous French scientist who is visiting camp while Hogan smuggles the real one out.
Klink replaces Schultz with a tough sergeant after Newkirk gets Schultz drunk.
Hogan uses Klink to contact an Allied spy, after Klink bugs the prisoners' quarters.
Hogan plans to destroy a heavy water supply by convincing Klink it is a youth potion so he will drink it.
Hogan must discover what the documents are that a visiting general is guarding.
The heroes plan to blow a bridge near camp when a bomber raid fails.
A visiting general upsets plans to blow up a train.
Stalag 13 is named one of the top ten prison camps in Germany, but it's just a distraction for Hogan and his men to destroy a secret rocket bomb.
The POWs smuggle a new Tiger tank, about which Klink has been boasting, into camp in order to photograph and study it.