Continuity mistake: After Ralph stops two of King's ranch hands from getting Desperado, Ralph is beaten up and left lying on the ground, then just as Desperado nudges Ralph awake Ralph's shirt is entirely different in this shot. Also, note the horse's feed on the ground under Ralph, used to keep the horse's attention so it appears to be nudging Ralph. (00:05:45)
The Best Desk Scenario - S1-E9
Continuity mistake: After the successful junkyard arrests, when it cuts to Ralph and Pam walking outside at the high school they stop at Ralph's new office. Its exterior door is white with three nameplates attached, and a brick wall perpendicular to it, but a few minutes later, while Bill and Ralph are arguing it cuts to another exterior shot of Ralph's office, and now the door is blue with one nameplate attached, and the brick wall has vanished. (00:45:25)
Reseda Rose - S1-E6
Continuity mistake: While Bill and Ralph drive around checking on the FBI's list of addresses, in the closeups the mirror Ralph uses for his visions is attached to the sun visor with metal clips, but each time Ralph pushes the visor back up the metal clips are gone.
The Greatest American Hero (2) - S1-E2
Continuity mistake: When Ralph escapes from the hospital and jumps into Pam's car, we see the entire front windshield without any sun visors or rearview mirror, but two sun visors and a rearview mirror suddenly appear in the closeup, which then disappear only to reappear and disappear again. (00:07:30)
The Greatest American Hero (1) - S1-E1
Continuity mistake: When Ralph is driving his station wagon, the rearview mirror disappears and reappears between the interior and exterior shots.
The Greatest American Hero (1) - S1-E1
Continuity mistake: While Bill and Ralph are in the car, John Mackie appears under the ship carrying the case with the suit. After John places the case in the car's trunk he walks back towards the ship empty handed, but in the last shot of John standing under the ship he's still holding the case.
Reseda Rose - S1-E6
Continuity mistake: When Ralph is flying to Simpsons house, he continuously flies over the same area 5 to 6 times...meaning it is just reused footage. (00:20:50 - 00:21:40)
The Greatest American Hero (1) - S1-E1
Continuity mistake: In one scene, Ralph is in a phone booth desperately trying to make a phone call. Ralph is nervous and panicky. But when you look at his reflection on the phone, you can see a big relaxed smile on him. When it cuts back to him, he is still acting nervous and panicky.