Continuity mistake: After Gil comes into Frasier's booth to talk following the 'outing' caller, Frasier begins packing his briefcase, then shuts it. Seconds later, it is still open and he shuts it again.
Continuity mistake: The shot after Roz says "Roz Doyle, radio producer, single" shows the guy nearest to the window in the other room with his left hand next to his mouth and the woman next to him with her hand next to her chin. The following shot shows the man closest to the window with both his hands next to his mouth and the woman sitting next to him with her hands on her lap. (00:07:35)
Continuity mistake: In the scene where Frasier, Martin, and Niles are in the kitchen putting candles on Freddie's birthday cake, you first see the Louis Pasteur cake facing Frasier. The camera pans out and then back in. When it does, the cake has turned around. The camera pans back once more, and the cake is back to its original position.
Where There's Smoke There's Fired - S3-E21
Continuity mistake: When everyone is sitting at the table having dinner, the amount of food on Bebe's plate changes repeatedly. She adds extra food twice, once from the pot and once from Martin's plate, but the difference in portion sizes changes more times than that and without time for it to be eaten. (00:11:05)
Match Game - S11-E18
Continuity mistake: The scene where Charlotte comes to Frasier in the restaurant to tell Frasier his date has cancelled is poorly edited between shots. Watch the folder once she has pulled it out: in almost every shot, the side facing the camera changes, and when Charlotte gets up, it disappears completely.
A New Position for Roz - S10-E24
Continuity mistake: When Bulldog is finishing his speech at the party, Julia looks at Roz. The angle changes and Julia has suddenly turned 180 degrees.
The First Temptation of Daphne - S9-E3
Continuity mistake: Martin says that Eddie will find the cricket, and puts him down on the floor so he can begin to search. He places him right in front of the green chair. In the next shot, we see Eddie spinning around on the floor, but the chair isn't visible in the frame like it should be. Instead there's something that looks like a gray stool there.
You Scratch My Book... - S2-E15
Continuity mistake: Honey walks over to Frasier, a glass of wine in one hand. Then suddenly she uses both hands to rub his shoulders. Supposedly she gave him the glass because it is all of a sudden in his hand now, but we never see him take it from her.
Continuity mistake: In the opera, when Marty waves at the ladies, Fraiser tries to pull his hand down. He looks over at the ladies as he does this, but in the next shot he is turned towards Marty.
Continuity mistake: Just after Niles has run out of Cafe Nervosa, the tip he left on the table keeps vanishing and reappearing between shots.
Some Assembly Required - S10-E19
Continuity mistake: When Frasier and Roz are at Cafe Nervosa together, just as Daphne enters, Roz's coffee cup goes from being held in her hand by her chest to down on the table in an instant.
Continuity mistake: When Niles and Frasier are first talking to one another in Cafe Nervosa, Niles' coffee cup goes from held in his hand to sat on his saucer in an instant.
Roz, a Loan - S6-E9
Continuity mistake: The bag of beauty products changes, one with a logo and one without.
Continuity mistake: In the beginning scene, Niles and Frasier are arguing by the door. Right after Niles leaves and Frasier yells "Get out! ", the camera pans out and you can see the entire room, at which point Roz is holding her wine glass in her right hand. Immediately after, the camera cuts to Roz who says, "yeah, some nerve..., " and the glass is now on the table in front of her left hand. There wasn't time for her to set it down (especially across her body), and the camera stays focused on her continuously through both shots.
The Last Time I Saw Maris - S3-E8
Continuity mistake: Daphne is holding a fire poker when she is having a psychic message. Just after Niles says "Oh dear God", the poker is held straight up. In the next shot, the poker is partially lowered. (00:03:35)
Fool Me Once, Shame on You, Fool Me Twice... - S2-E14
Continuity mistake: Daphne visits the radio station where Frasier works about halfway through the episode. She holds the earphone piece up to her right ear, then it cuts to a different camera angle and the headphones are lying on the desk with no time between shots. It's actually quite glaring.
The Devil and Dr. Phil - S10-E21
Continuity mistake: When Bebe is talking to Frasier, she is eating a piece of celery. The piece changes size between shots, most noticeably at the very end of the conversation when it suddenly goes from large to tiny.
Continuity mistake: When Daphne steals Niles' Segway, Cora is laughing in the background and covering her mouth with both hands. The angle changes and now her hands are on the table.
A New Position for Roz - S10-E24
Continuity mistake: When Niles and Daphne are babysitting Alice, a pink feather from Daphne's boa keeps vanishing and reappearing on the side of her chair.
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.