Character mistake: At the start of the episode when the plane is spotted Sgt Saunders says "P-51." The plane is in fact a P-38 Lightning.
Revealing mistake: When the German soldiers are shot and fall dead into the water, one of them raises his head to take a breath, then goes back to being "dead."
Continuity mistake: Mark Richman's character has an empty holster after the crash, but moments later there is a .45 caliber weapon there.
Continuity mistake: The Jeep driver's helmet keeps disappearing and reappearing as the shots change.
Factual error: The German radio-wave detection vehicle is a very poorly disguised American ambulance.
What Are the Bugles Blowin' For? (1) - S2-E25
Visible crew/equipment: When the British captain orders Saunders to stay with him and walks back to his office, you can spot film crew in the glass reflection. (00:20:45)
The Short Day of Private Putnam - S2-E28
Factual error: The German snipers are wearing American-issue camo jackets.
The Short Day of Private Putnam - S2-E28
Revealing mistake: 2/3 through, Beau Bridges comes upon a dead German but you can see the German breathing. Oddly, it's a fairly far shot, so he must have been breathing pretty heavily.
The Short Day of Private Putnam - S2-E28
Character mistake: Hanley's call sign is Checkmate King Two. But his radio man recites, "Checkmate King Two, this is White Rook." Should have been the other way round.
Revealing mistake: In several scenes when they show the front of the barrel of the German machine gun you can see the "blank adaptor" inside the barrel. This is inserted to not allow the gas from the cartridge to escape out the barrel but "blow back" the bolt and insert another round.
Mountain Man - S3-E1
Revealing mistake: When Saunders and his men escape from the Germans, it's supposed to be after sundown. But the entire chase scene that follows is filmed in broad daylight. (00:19:20)
Mountain Man - S3-E1
Revealing mistake: As the German chases Cage, there are multiple ski tracks in the snow from previous takes. (00:35:35)
Mountain Man - S3-E1
Factual error: Combat is set in Northern France, where there are no snow-capped mountains. Yet Saunders' troops are crossing such terrain here. It's also apparent that, despite dialogue referring to sub-zero temperatures, it isn't really very cold. The actors are sweating in their snow gear, there's no frost on them, and no one's breath is forming any clouds in the air.
Factual error: The planes Hanley identifies as Messerschmitts aren't. They're stock footage of U.S. P51 Mustangs.
Continuity mistake: The room that is being used is downstairs from road level, but a window in the room shows tree top level scenery. (00:41:15)
Audio problem: Season 3, Episode 68, "The Duel". Sometimes the tank's co-axial machine gun is firing, but no gunfire sound is heard.
Revealing mistake: Season 3, Episode 68, "The Duel": The prop wash from the helicopter filming the overhead scenes are evident as everything (dust, twigs, leaves, etc.) is being blown around.
Continuity mistake: Season 3, Episode 68, "The Duel": When the truck first blows its tire, it is in a very muddy, watery patch of road. Subsequent scenes show the road is dry except under the truck where the truck driver is trying to jack up the truck to change the blown tire.
Continuity mistake: The German tank has its main gun traversed to the rear of the tank as Sgt. Saunders is trying to climb aboard. A following shot shows the tank with its main gun pointing forward, then the next shot The Gun is facing toward the rear again.
Continuity mistake: Season 3, Episode 68, "The Duel": Opening shot shows a "German" tank with the commander's cupola on the left side of the turret. As the "German" tank is really an M-41 Walker Bulldog from the Korean/Vietnam era, the cupola should be on the right side of the turret as the majority of American tanks since WWII have that feature. Obviously, the film was flipped.