Continuity mistake: During the scene where Niles tells the chef to serve the souffle in a large bowl, there is a large bowl of food next to him with no utensil in it. When Niles says "Table Twelve is still waiting for their entree", there is suddenly a utensil sticking up in the center of the bowl.
Continuity mistake: Frasier gets out his address book to look for women he's dated but we can see the pages are blank even while he reads out names. He is not making them up, as he does phone one named Tatiana later.
How to Bury a Millionaire - S6-E7
Continuity mistake: Near the end of the show, Niles has signed his lease for the Shangra-La with his Noel Coward pen and he puts on the table next to the lease. A couple of shots later we can see the pen lying on top of the lease, even though no one touched it.
Revealing mistake: Near the end, in Cafe Nervosa, the guy that wants to sue Frasier gives Niles a push. Niles stumbles backwards, knocking over some chairs and the coat rack before falling down, taking the table by the window with him. If you look closely just before he hits the table, the woman sitting there (rather than moving out of the way), very subtly pulls on the table, so as to upend it so Niles can go down with it.
And the Whimper is... - S1-E18
Continuity mistake: Just after Roz puts Bebe's bag on the table at the Cafe, we see her back at the counter - there was not enough time for this to happen naturally.
Continuity mistake: When Niles is engaged in his ironing fiasco, Eddie is watching his every move. When Niles heads to the kitchen to get spot remover, Eddie is sitting on the footstool. The next shot shows Eddie turned to watch Niles - but he is now in the chair; it is not just a tricky angle, as he actually lays his chin on the back of the chair. There was no time for Eddie to jump from the footstool to the chair.
Continuity mistake: At the end of the show, when Martin, Niles, and Frasier are leaving Niles's place to go out for ice cream, they leave Maris's opened package on a large footstool next to a decorative metal bowl. When they return (closing credits) with their ice cream the package and its wrappings are gone - even though no one was left behind in the apartment.
Revealing mistake: During the scene where Frasier is dropping Charlotte off at the train station (the first time) you can see the background behind him shows that the car they are in is turning left. Yet we can see his hands on the top of the steering wheel and during this time he never turns the steering wheel.
Continuity mistake: When Frasier is sitting on his couch, talking about his new agent, the white bag containing the video Niles brought over changes position on the table behind him.
Continuity mistake: During the bathroom scene where Frasier is in the bath talking to everyone, the bubbles on his face and shoulders change in position and amount from shot to shot.
Odd Man Out - S4-E24
Continuity mistake: Near the start of the show, when Frasier is checking for phone messages, his raincoat hanging up in the background sometimes has a bunched up sleeve and sometimes doesn't.
Continuity mistake: While Frasier is driving, Marty has the map on his lap. During this scene the map changes appearance and size from shot to shot even though Marty never opens it up.
A Word to the Wiseguy - S3-E15
Continuity mistake: At the end of their meeting outside Cafe Nervosa, Jerome throws his red paper napkin on the table and they say their goodbyes. In the shot after he walks away there is no sign of the red napkin.
Continuity mistake: Early in the show, Frasier, Niles, Daphne and Martin are talking about going to The Ski Lodge. Daphne is holding a laundry basket - the laundry items under her elbow change during the scene.
Continuity mistake: In class, Frasier passes a note to Niles who folds it in half. The teacher grabs it away from Niles, and unfolds it himself - but it is now folded in four, not in two.
Legal Tender Love and Care - S8-E6
Continuity mistake: Frasier, Niles, Daphne, Marty, and Abby are having dinner at a restaurant. Abby has a notepad and cellphone on the table. When Niles announces Donny has just walked in, the next shot shows Abby drinking champagne, but the notepad and cellphone have disappeared.
Dark Side of the Moon - S7-E22
Continuity mistake: Simon has shown up at Daphne's shower and is standing at the bar/table with Roz and Holly. There is a bottle of champagne on the table, next to an ice bucket - but when Daphne drags Simon away the shot shows that the bottle has mysteriously made its way into the ice bucket.
The Dog That Rocks the Cradle - S7-E5
Continuity mistake: Bulldog brings pizza to Frazier's apartment, and Niles pays him. As Bulldog says goodbye to Frasier, he puts the money in his pocket. When Roz comes out from the back bedroom and sees Bulldog, we see him put the money in his pocket again.
Continuity mistake: In the opening scene, Roz is in Cafe Nervosa reading a children's book. Frasier comes in and she puts the book behind her, presumably into her purse which is hanging on the chair. But throughout the scene, the book is sitting on the table in front of her.
Continuity mistake: When Frasier is in his car with the woman, her seatbelt changes several times between shots. At least once it's off then on almost instantly, and sometimes it's under the lapel of her coat and then suddenly on top of it.
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.