Factual error: The sea plane that lands to rescue Savage at the end is a type not built until after the war. And it's marked "U.S. Air Force," an entity that also didn't exist until after the war. During WWII, what later became the Air Force was known as the U.S. Army Air Corps.
Factual error: Alice says she wants to thank "The U.S. Air Force." There was no such entity during WWII. What later became the USAF was then known as the U.S. Army Air Corps. (00:23:20)
Continuity mistake: Savage's bomber is hit and the left wing catches fire. But in the stock footage shot that follows, it's the right wing that's burning. (00:10:00)
Factual error: Season 3, "To Seek and Destroy": It's supposedly 1944, but the German agents are pursuing the Americans in a Renault Dauphin manufactured in the 1960s. (00:41:30)
Factual error: Season 3, "To Seek and Destroy": Though the dialog throughout makes reference to the launch of a V-1 rocket, the stock footage shown is of a V-2. (00:05:00)
Show Me a Hero, I'll Show You a Bum - S2-E7
Factual error: The 1943 London air field is crowded with P-51 Mustangs - planes that weren't introduced in Europe until 1944.
Continuity mistake: Gallagher looks out at his wrecked B17 from the ruins, and the aircraft's tail section is facing the camera. Several minutes later, he looks again from the same vantage point, and the burning plane's nose and engines are now facing the camera. (00:11:35)
Factual error: The Russian church has Latin crosses inside and out. It should have the more ornate Orthodox crosses, which are quite different in design.
Show Me a Hero, I'll Show You a Bum - S2-E7
Factual error: It's 1943, but Kamanski's flight jacket sports a 50-star flag. The flag should, of course, have 48 stars.
Revealing mistake: When Malot lunges against the cage holding Savage, the "iron" bars bend inward. (00:30:25)
Factual error: In the initial opening credits, there's a statement that the flying battle scenes were flown by the Air Force. At the time of the events depicted there was only the Army Air Corps. 1947 was the beginning of the Air Force.
Factual error: It's an error that plagued many episodes, but here again, the flight jackets hanging behind the bomber pilots have 50-star flag patches on the shoulders. (00:30:25)
Mutiny at Ten Thousand Feet - S1-E25
Continuity mistake: While Savage struggles with Kemp in the cockpit, the bomber goes into a nosedive. The next shot is stock footage that shows several people jumping from the plane and deploying parachutes. But when we cut back to the interior set, no one in Savage's crew has bailed. (00:42:00)