The Last of the Fourth of Julys - S1-E10
Revealing mistake: When Steve is practising with the grappling hook, there's a shot of the ground where the grass is flying in reverse, revealing that the shot was played backwards. (00:11:04)

The Last of the Fourth of Julys - S1-E10
Revealing mistake: On the island, when Steve pole-vaults, he is replaced by a much younger stuntman with longer hair. (00:19:33)
The Last of the Fourth of Julys - S1-E10
Revealing mistake: When Steve arrives at the island and climbs up the rock, watch the waves behind him: they're moving in reverse.
The Last of the Fourth of Julys - S1-E10
Revealing mistake: On the island, when Steve is climbing up or down the mountain, his stunt double has a different build and a completely different hairstyle.
The Last of the Fourth of Julys - S1-E10
Revealing mistake: As the torpedo reaches the shore, the towing cable on the front is visible.
The Last of the Fourth of Julys - S1-E10
Revealing mistake: When Steve is running with the pole, about to jump over the high bar, he is replaced mid-run by a stuntman with noticeably longer hair. Mid-air, the stuntman is then replaced again by Steve.
Revealing mistake: When Steve pole-vaults, he is replaced by a blatant stuntman.
Revealing mistake: When Josh climbs up the scaffolding, his stunt double is noticeable, especially in the close-up right before he reaches the top.

The Coward - S1-E12
Revealing mistake: When Steve swings a branch at the riders, and again when he jumps and kicks a man off his horse, he is replaced by a stunt double.
The Coward - S1-E12
Revealing mistake: When Steve is rappelling and crashes, he is replaced by an obvious stunt double.
Revealing mistake: After Steve jumps off his horse and fights a thug, a second attacker comes at him from behind. At that moment, Steve's stunt double becomes obvious, as he has a completely different haircut and a noticeably bigger build. (00:38:40)
Revealing mistake: When Steve pushes a man out of the pickup truck, he is replaced by a stunt double who looks nothing like Lee Majors. The fact that the scene is shown in slow motion and in a close-up makes it even more obvious.

Revealing mistake: When Steve is hit with a dart in the back, the safety pad under the stuntman's shirt protrudes.






