To Kill a Talking Bird - S4-E14
Visible crew/equipment: After Frasier starts the fireplace and it scares Niles' bird, you can see the hands of a bird handler by the stairs on the upper right of the screen. (00:12:21)
To Kill a Talking Bird - S4-E14
Other mistake: It seems very out of character for Niles, who is so obsessed with cleanliness, to be happy with having a bird flying loose in his kitchen.
To Kill a Talking Bird - S4-E14
Continuity mistake: At the beginning of the show the spoon in the custard dish on Martin's table shifts from side to the other from shot to shot.
To Kill a Talking Bird - S4-E14
Continuity mistake: Niles has his dog over at Frasier's. He sits down on the couch and the dog is facing the door. The next shows the dog standing about two feet away and facing the balcony - and the third shot shows her back in the first position. There was no time for her to change positions naturally.
Answer: It equals the record of James Arness of "Gunsmoke" for the actor who's played the same part on TV NOT in a soap opera. If you include soaps there are two main contenders - William Roache, who's been playing Ken Barlow in "Coronation Street" in the UK since 1960. Don Hastings has been playing Robert Hughes in US soap "As the World Turns" since 1960 as well.