The Killer - S1-E1
Continuity mistake: At the beginning of the episode, The Killer (John de Lancie) strikes. He is holding the champagne flute with the middle finger curled between the hand and the belly of the glass, but in close-up the finger is at a right angle in front of the stem. (00:01:55)
The Killer - S1-E1
Continuity mistake: Jim's pupil and successor Copperfield is poisoned at the beginning of the episode. He screams, drawing the attention of the party guests. In the following POV shot, the guests are standing in entirely different spots in the room all of a sudden. (00:02:45)
The Killer - S1-E1
Revealing mistake: When Copperfield meets an untimely demise, Vince Martin' s stunt double that performs the fall is recognizable as such (his hair does not even remotely match). (00:03:25)
The Killer - S1-E1
Continuity mistake: When Jim picks up the box with the mission briefing, his hand in the close-up of the fisherman's case is at the bottom of the box, but it's on the opposite side when we see Peter Graves retrieve it. (00:07:00)
The Killer - S1-E1
Revealing mistake: When Drake puts the bomb against the ceiling, the 'concrete' wobbles. (00:40:00)
The Killer - S1-E1
Other mistake: We are of course not privy to the protocol of the secret service organization Jim Phelps is a member of; however, while he is at his own place choosing at his leisure the team members, Jim to pick Nicholas types "KJ" on the laptop, to pick Casey he types "PK", then to pick Max and Grant he just clicks a TV remote. Whatever system they are using, does not seem to make any internal sense.