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.
Revealing mistake: Season 3, Episode 73, "Losers Cry Deal", a GI in The Squad fires a rifle grenade at a German machine gun position in a window of a building. Not only does the rifle grenade miss the mg position, it misses where the pyrotechnic representing the rifle grenade exploding was planted.
Revealing mistake: The grenade Saunders tosses onto the German tank does not land where the pyrotechnics explode.
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)
Revealing mistake: Season 3, "The Imposter": During the march, Rick Jason slips and says, "Peabody! Bring up the rear!" He was supposed to say "Littlejohn." Peabody is the actor's real name.