Continuity mistake: When the top secret airplane causes the light aircraft's loss of control, in the long shots the aircraft's tail is red/blue, but in the closeups it's brown/gold and the style differs. Also note the name "Beechcraft" has duct tape covering part of the name. (00:29:15)
Continuity mistake: When Ralph lifts Bill's car the first time, the blue license plate on the front bumper is gone, but when Ralph is amazed at the suit's power he lifts the car a second time, and the blue license plate is in its proper place on the bumper. (00:35:50)
Revealing mistake: When Ralph stops the hijacked train before it reaches the city of Bakersfield, due to the close proximity of the camera it's too obvious that Ralph's footwear has been altered for the stunt, as he glides across the tracks. (00:44:30)
Continuity mistake: When the engineer shuts down the train he's wearing a long sleeve jacket, but in the closeup we see a bare arm wearing a watch. The terrorists remove that engineer and he's replaced with McGivers, another engineer wearing a jacket, and the same bare arm is in closeups. Then a third engineer on another train has the same arm in the closeup. (00:06:40)
Visible crew/equipment: When Bill can't start the bus Ralph opens the hood and tells Bill the entire engine is gone, then as Ralph grumbles about what he'll tell the school board, the boom mic dips into view over Ralph, at the top of the screen. (00:33:50)
Revealing mistake: When Ralph blocks Hydra's rocket from its target, in the closeup as the rocket hits Ralph's abdomen the thin stunt wire is visible at the rocket tail. Then while Bill is fighting with Hydra, when Ralph is in mid-air heading to Bill the stunt apparatus is visible at Ralph's waist. (00:40:00)
Continuity mistake: Preacher forces Ralph to stop the sheriff, so when Ralph flies over and pulls the driver's door off the squad car, we see the Sheriff behind the steering wheel wearing his uniform shirt and dark colored pants of some sort, but when the Sheriff stands up his uniform shirt is properly tucked into his normal tan pants, same as earlier. (00:39:05)
Other mistake: Preacher has a large bold tattoo at the center of his chest below his neck that changes repeatedly. For example, it's dark and clear when they capture the deputy, but it's smudged and partially gone when Preacher forces Stella, the deputy, and Ralph into the 18-wheeler. (00:29:10 - 00:36:50)
The Hit Car - S1-E3
Continuity mistake: After Bill is shot in the hand at the beachhouse one of the hitmen takes off in a van with no side windows, but as Ralph begins to run after it the speeding van is different and has windows on the side, then it's back to the original van. (00:27:35)
The Greatest American Hero (2) - S1-E2
Continuity mistake: At the end, when the aliens appear in the desert again, Ralph is in the front seat of Pam's car as the aliens suggest Ralph try invisibility, but after Ralph shouts that he lost the instruction book, when it cuts to a long shot Ralph is standing in front of Pam's car, then he's back in the front seat. (00:44:00)
The Greatest American Hero (2) - S1-E2
Continuity mistake: At the hospital, when Ralph is sitting in the wheelchair the nurse calls for the orderly to help subdue Ralph. Two orderlies appear, and the black orderly's tunic has short sleeves well above his elbows, but as they all enter room six that orderly's tunic now has sleeves considerably longer and baggier than the previous shot. (00:02:45)
The Greatest American Hero (2) - S1-E2
Continuity mistake: When the police take Ralph to the hospital he's wearing his red suit that has slim fitted sleeves without cuffs, but as Ralph's right wrist is being forcibly restrained to the gurney, in the closeup Ralph's right sleeve appears to be the long sleeve of a red fleece shirt instead of his red suit. Additionally, in this closeup the white orderly's arms are much hairier and his watch vanished as well. (00:02:50)
The Greatest American Hero (2) - S1-E2
Continuity mistake: When Ralph is taken to the hospital and forcibly restrained to the gurney in room six, the black orderly is wearing a watch on his left wrist, but as he closes the restraint strap around Ralph's left wrist in the closeup that orderly's watch has vanished. (00:03:10)
The Greatest American Hero (2) - S1-E2
Continuity mistake: After the trio escape from the locked room, Bill tells Captain Crash to stop the President's helicopter, and when it cuts to the long shot of the approaching chopper, a different type of helicopter is in following shots. (00:32:45)
The Greatest American Hero (2) - S1-E2
Visible crew/equipment: When Ralph flies up to the President's helicopter to warn the pilot, Ralph circles the aircraft and shouts "Get out of here, dummy," and as the pilot turns his head during this stunt while he's in mid-air, we can see the appearance of filming equipment right outside the cockpit's other open window. (00:33:35)
The Devil and the Deep Blue Sea - S2-E15
Visible crew/equipment: While Bill, Ralph, and Pam are on the Contrail deliberately steering the boat to bait Devereaux's men, the shadows of the cameraman, camera, and equipment are being cast onto Bill and the helm seat in front of Pam. (00:35:30)
Reseda Rose - S1-E6
Visible crew/equipment: While Rose gets ready to leave for work and puts on her jacket she asks Rhonda about her plans for the evening, and the shadow of the moving boom mic is visible at the top, right side of the screen. (00:05:25)
Continuity mistake: When everybody returns to the bus, in the closeups of Bill turning the ignition key to no effect, the sleeve we see has navy blue and white stripes, but Bill is wearing a light color blue striped shirt. (00:33:20)
Deliberate mistake: After Ralph puts the suit into the trash can, when it cuts to Stovington Siding with the hijacked trains one of the shots is flipped, note the "102" is backwards. (00:24:40)
Don't Mess Around With Jim - S2-E3
Revealing mistake: While they're on Beck's jet Ralph uses the suit's telekinetic powers on the ice-filled cup, and Ralph tells Bill he'll do it again with a magazine, then when it cuts to the first closeup of the magazines the stunt wire attached to the book is visible. (00:15:45)