The exploits of five World War II prisoners in a German POW camp, 'Stalag 13' who, while "under the cover" of being typical prisoners of war, are really secretly doing their utmost to sabotage the German war effort through whatever means necessary. Col. Klink is very proud that no prisoner has ever escaped under his watch, not that they would want to. Suave, cool and smart, Col. Hogan takes advantage of Col. Klink and Sgt. Schultz's bravado and general cluelessness to carry out his missions.
Colonel Hogan needs LeBeau to whip up something special for a German general, but the chef has made plans to escape to France.
Colonel Klink is set up for execution after the gestapo finds him with underground information --- planted on him by Hogan.
Sergent Schultz falls head over heels for an attractive woman --- but Hogan suspects that she is a Gestapo agent and has Carter shadow the two loverbirds on one of their dates.
The hapless Colonel Klink lands a date with a German firing squad after Sergeant Carter, disguised as Klink, is spotted at a sabotage site.
Carter returns from an unsuccessful mission with a new pal in tow --- a runaway chimpanzee from the local bombed-out zoo. The men of Stalag 13 decide to make "Freddy" their barracks mascot --- but Hogan sees a more practical use for the happy-go-lucky chimp.
While on a sabotage caper, Hogan and Carter encounter a German general, overpower him, and smuggle him back to Stalag 13. Once there, they come up with a ploy to trick the disoriented general into revealing his troop's attack plans.
Hogan must deliver important information to a contact in the nearby town, but the Gestapo has cracked down tight on the camp. Will Hogan be forced to make traitorous pro-Nazi statements to Axis Annie of the German Propaganda Ministry in order to get the information to its destination?
When Hogan and his men set out to destroy the Germans' new S-5 gun that's being guarded at Stalag 13, they uncover more then they bargained for --- a traitor amongst their ranks who has gone to Colonel Klink to report on Hogan's planned sabotage.
The Germans' plan to shoot down British bombers by using captured RAF airplanes is uncovered, and Hogan and his men must attempt to destroy the aircraft before they can be flown on their deadly, deceptive mission.
Hogan and his men have cleverly rigged the tabletop centerpieces to explode during a banquet for Germany's top generals --- unaware the one of the guests at the banquets is an invaluable spy working undercover for the Allies.
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!
Paris is targeted for destruction should the Allied armies invade, so Hogan and Kinchloe secretly travel to the French capital to learn more about the plot --- and end up seeking help in their caper from an exotic dancer/medium named Kumasa.
Hogan's plan to sneak out of Stalag 13 and blow up a German train hinges on getting General Burkhalter's lovelorn sister --- the marriage-minded Gertrude --- to distract Colonel Klink.
Hogan prods Sergeant Schultz to reveal the site of a secret atomic installation that Schultz has been assigned to guard.
Things heat up as Hogan schemes to return a load of stolen paintings to London, just as Marya convinces Schultz to impersonate Reich Marshal Goering.
Hogan and his men face the difficult task of returning a Soviet pilot to his homeland --- especially when the fanatical, demanding Russian refuses to follow the usual escape route to England.
To get ahold of secret papers, Hogan enlists a beautiful Russian spy to convince Klink he's needed at the Russian front.
Hogan steals the Luftwaffe codebook, but can't use it after Newkirk accidentally drops it down a well.
To transport secret documents, Hogan sets up Klink with a female agent --- but when the wrong documents fall into Klink's hands, Schultz becomes the delivery boy.
A German general is the mastermind behind a plan designed to prolong the war, so Hogan winds up working with the general's daughter in an effort to photograph the strategic documents.
Hogan and his men are determined to create chaos during some staged war games a ruthless Nazi colonel has scheduled near Stalag 13. So what do you suppose would happen if the fake explosives planned for the exercises were somehow replaced with live ammunition?
Hogan kidnaps General Burkhalter's sister, with the intention of exchanging her for a captured Allied agent.
Part 1 of 2. When Sir Charles Chitterly parachutes into Stalag 13, Hogan asks Colonel Crittendon to pretend he's Sir Charles --- but Lady Chitterly isn't fooled.
A famed scientist is recruited by the Germans to develop a revolutionary new metal alloy for the Nazi war machine --- so Hogan and the gang must distract the doctor --- or worse --- to keep him from accomplishing his task.
Hogan must somehow get himself hospitalized so that he can get top-secret information from a wounded British agent who has been posing as a Nazi officer.