Continuity mistake: While Diamond talks to the newspaper editor, he has two locks of hair falling over his forehead in full shots, but in close-up, his hair is neatly combed back. The forelocks come and go repeatedly after that, throughout the episode. (00:18:00)
The Payoff - S2-E3
Continuity mistake: When he's turning to leave Mr. Wilkins' club, Diamond's hat jumps from his left to his right hand between shots.
Continuity mistake: The 8x10 photo Diamond shows the bartender disappears from the bar between shots.
Continuity mistake: Diamond parks just inches behind an old car and then enters the Chinese restaurant. When he comes out again, the older car is in the same place, but his Plymouth has somehow moved itself back several feet.
Continuity mistake: During the wedding scene at the end, Diamond's hair is falling over his forehead in half the shots and combed straight back the rest of the time.
Continuity mistake: After the wedding, the new bride kisses Diamond good-bye. She's standing just inches from him, but when the camera angle reverses, she has instantly jumped to a spot several feet away.
Continuity mistake: Diamond returns to the all-night cafe and parks with his car pointing toward the door. After he goes in and comes back out, the car is in a completely different position, parked parallel. (00:10:20 - 00:11:30)
Continuity mistake: The apartment manager scares off the street gang attacking Diamond. In full shot, Diamond is leaning over, arms spread across the hood of his car. When it cuts to a tighter two-shot, he's immediately standing straight as he talks to the manager.
Short Haul - S2-E13
Continuity mistake: During the drive to Mr. Neate's house, the cars in the rear-screen projection keep changing instantly, depending on whether the camera is on Diamond, on O'Malley, or on both of them.
Continuity mistake: After the bad guys rough up Diamond in his apartment, his hair alternates several times between falling over his forehead and staying neatly combed as the camera angles change.
One Foot in the Grave - S2-E20
Continuity mistake: Two thugs knock Diamond unconscious and leave him in a parking lot. When he wakes up, he's lying in a different spot, farther away from a painted white line, than he was when he fell. (00:05:20)
One Foot in the Grave - S2-E20
Continuity mistake: While Diamond is talking to Yvette, she leans on the record cabinet and one of its doors swings open. A few shots later, though she hasn't touched it again, the door has closed itself. (00:11:15)
One Foot in the Grave - S2-E20
Continuity mistake: Diamond's hat falls off during the fight, then moves itself to a different place on the floor between takes. (00:22:15)
Snow Queen - S2-E21
Continuity mistake: Diamond's loose tie tightens itself between shots when the doorbell rings and he crosses the room to open the door. When he picks up the phone, the tie is loose again, but when he opens the door to leave, it's tightened. (00:42:15 - 00:45:00)