It appears Sergeant Schultz will be shipped off to the Russian front after he accidentally interrupts a black market meeting. If he goes, Colonel Hogan will lose his courier of secret messages between Stalag 13 and a female spy.
When Sergeant Carter constructs an amazingly complicated rabbit trap, a suspicious Colonel Klink comes to believe that the contraption is a secret electronic spying device.
Colonel Hogan innocently sends Corporal Newkirk off on a mission to rendezvous with an ally—unaware that the meeting is a trap set up by the Gestapo.
The clumsy and annoying Colonel Crittendon inadvertently messes up Hogan's plans to destroy a German ball-bearing plant.
Is love blind? Three beautiful German girls arrive at Stalag 13 and set the men's hearts beating faster, but their mission is to pry secrets out of the love-struck POWs.
A canine caper is off and running when a dog buries a bone containing photographic images of a new German tank that Carter had taken with his camera.
Hogan dispatches Sergeant Kinchloe on a mission to warn Newkirk and Carter that the duo's mission to dynamite a newly-established Nazi rocket fuel installation could blow up in their faces.
How will Hogan steal an important, strategic map from the Germans? By underbidding all competitors for the contract to paint the offices of Luftwaffe headquarters.
After making arrangements to send her to England, Hogan begins to worry that his beautiful underground contact, Heidi, might actually be a double agent.
Shortly after Hogan helps a journalist escape to freedom, the Germans are amazed to read an American newspaper story about a sabotage-and-subterfuge unit hard at work right under their noses at one of their POW camps.
Hogan and his men join forces with an undercover agent and steal away to Berlin to nab a German defector who can compromise their entire operation at Stalag 13.
Can Hogan locate the secret German air base commanded by a World War I flying ace known as the Blue Baron? Yes --- by convincing Colonel Klink to throw a party for the famed aviator.
The hapless Colonel Klink lands a date with a German firing squad after Sergeant Carter, disguised as Klink, is spotted at a sabotage site.
Hogan is ordered to capture an "escaped" Corporal Louis LeBeau --- but in a manner that will ensure LeBeau's completion of an espionage caper.
Hogan's scheme to kidnap General Burkhalter and trade him for an underground agent goes awry when Colonel Klink --- not the general --- is the one who gets kidnapped.
Hogan and his men plan to eliminate an allied defector, but complications ensue when their target turns out to be a beautiful woman.
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.
When Colonel Klink uses a beautiful baroness to try to wheedle secrets out of Colonel Hogan, he apparently falls under the femme fatale's charms. Or does he?
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.
The French underground is in desperate need of valuable radios, so Hogan decides to utilize Colonel Klink's former girlfriend to ensure the delivery of the equipment.
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.
The race is on when Hogan and his men are ordered to collect air-dropped ammunition and distribute it to underground units widely scattered around the region.
Hogan is stunned to learn that the Germans are planning to send him to England, with a startling message for the Allied forces: surrender, or face the Nazis' "ultimate weapon."
Hogan's latest mission: destroy an elaborate anti-aircraft defense system designed by a beautiful English woman who has defected to Germany.
An Italian officer, who once studied under Colonel Klink, is the ideal candidate to assist Hogan and his men in a daring plan to photograph a new Nazi gun installation.
To celebrate Colonel Hogan's birthday with a bang, his men plan to surprise him by blowing up a Nazi ammunition dump. But will the merry celebrants fall into an elaborate trap set by the Germans?
Watch Hogan's Heroes Season 4, Episode 21: Up in Klink's Room online on FlixGems. 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.