Two Nazis for the Price of One - S3-E17
Visible crew/equipment: A string is seen attached to Colonel Klink's cap that is used to yank off the cap after Colonel Mannheim fires his pistol at Klink.
Visible crew/equipment: As Burkhalter is talking to Strauss and Klink in front of the office door, you can see the shadow of the boom mic moving over each as they talk.
Visible crew/equipment: As Hogan, Le Beau, Kinch, and Schultz talk at the car, the boom mic is reflected in the chrome and on the hood.
Watch the Trains Go By - S4-E19
Visible crew/equipment: As Carter and Newkirk are caught by the wire, the shadow of the camera pulling back is seen on the ground.
The Flame Grows Higher - S1-E31
Visible crew/equipment: Toward the end of the episode, after the two women are taken out by the Gestapo, Shultz, Hogan, Lebeau, and Newkirk are standing having a drink. The camera goes in for a close-up on Shultz, there is a noticeable shadow of the camera on Shultz's coat, and right arm.
Visible crew/equipment: As Hogan and Carter approach the staff car, the crew and film equipment are reflected on the chrome of the lights and radiator.
Some of Their Planes Are Missing - S3-E2
Visible crew/equipment: When LeBeau, Carter and Schultz enter the visiting Germans' quarters, when the door is open you can see the sound stage floorboards are uneven in front of the door to the neighbouring barracks.
Visible crew/equipment: After Hogan goes down into the tunnel in Klink's quarters, the stove moves back in place. As it does, the wire on the floor pulling the stove back in place is visible.
A Klink, a Bomb and a Short Fuse - S2-E8
Visible crew/equipment: As Burkhalter and Klink walk toward the office, the shadows of the crew, camera and lighting appear on camera.
Visible crew/equipment: Every time the boys use a flashlight to signal the planes, you can see the camera crew and equipment.
How to Win Friends and Influence Nazis - S3-E7
Visible crew/equipment: When Hogan gets up in the hotel room they're all in, the shadow of the boom mic plays on the wall he heads toward.
Visible crew/equipment: When Le Beau signals the plane, the camera crew is reflected in the flashlight.
The Battle of Stalag 13 - S2-E5
Visible crew/equipment: As first Feldkamp, then von Kattenhorn, get in their respective staff cars, the camera crew and equipment is reflected on the doors and glass.
Klink for the Defense - S6-E19
Visible crew/equipment: As Newkirk and Hogan enter the office, the shadow of the boom mic plays on the wall.
Visible crew/equipment: As Schultz calls for attention, the studio lighting is reflected in his monocle.
Watch the Trains Go By - S4-E19
Visible crew/equipment: As Schultz stops the car, studio equipment is reflected in the windows.
Watch the Trains Go By - S4-E19
Visible crew/equipment: As Linkmeyer and Klink get in the car, a man in a white shirt can be seen moving around the camera position in the reflection on the car under her window.
Visible crew/equipment: After Hogan, Le Beau and Schultz get into the car, and as it starts to move, chairs, people and equipment are reflected on the glass.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.