Continuity mistake: Roz is at Frazier's while Daphne massages her foot. They are talking about Bulldog and we can see one crutch behind her. When she says "I did not", there are two crutches behind her. Later in the scene it goes back to one crutch. (00:07:50)
Adventures in Paradise (1) - S2-E8
Continuity mistake: Bulldog is listening to Frasier talk to Madeline on the phone. Bulldog is holding the magazine under his arm, but in the next shot it is on top of the tape player and his hand is on top of it. There was no time for natural change.
You Scratch My Book... - S2-E15
Continuity mistake: Niles is holding his raffle ticket booklet over its envelope as he picks up Honey Snow's tape. As he says "insightful, isn't she?" the raffle booklet is suddenly under the envelope. (00:01:10)
Fool Me Once, Shame on You, Fool Me Twice... - S2-E14
Continuity mistake: In Cafe Nervosa, Frasier has just checked the priest's briefcase, think its his own. In one shot his hands are down by his side but in the next split second his left hand is up at his neck and then patting his tie.
Adventures in Paradise (1) - S2-E8
Continuity mistake: Frasier goes into his booth and puts down the magazine featuring Madeline with the page open. Bulldog comes in and looks at the page, and says how attractive she is. But it is definitely not the same page that Frasier had been looking at a couple of shots before.
Flour Child - S2-E4
Continuity mistake: When Frasier and Daphne are copying the names into the new get well card, we see Daphne using a pen with an orange lid. She puts the lid on the pen and sets it down. In the very next shot she is writing with the same pen.
Continuity mistake: When Frasier and Martin are leaving Artie's hospital room, Frasier has the door about one-third open. Just before they leave, though, as Frasier says "next time he'll stay longer", the door is open much wider. Nobody opened it wider during that time. (00:08:50)
Continuity mistake: Near the beginning of the show, Daphne is having a smoke, and Frasier takes it from her - her hand is on her knee but when the shot changes it is in her lap.
Adventures in Paradise (1) - S2-E8
Continuity mistake: When Frasier comes into the living room, Marty's cigar box is open. The shot then shows Frasier talking to Eddie about his socks, and the cigar box is suddenly closed. At the end of the scene, the cigar box is open again.
Duke's, We Hardly Knew You - S2-E5
Continuity mistake: Near the end of the show, when Niles, Frasier, and Martin are at Duke's, Niles says, "I'm not here just for you, Dad" and he puts his hand on Marty's shoulder. The next shot shows him standing about two feet away, with his hands by his side. (00:21:20)
Flour Child - S2-E4
Continuity mistake: Arleen the cab driver is in labour. She pushes her hair back with her hand in one shot, but in the next it is back on the steering wheel, without enough time for this to happen in real time. (00:05:50)
The Botched Language of Cranes - S2-E6
Continuity mistake: About halfway through the show, Daphne, Roz, Niles, Frasier and Marty are all in the living room. Roz hands Frasier a piece of paper, which he takes and starts to unfold it - in the next shot, he is taking the paper again.
The Show Where Sam Shows Up - S2-E16
Continuity mistake: At the end of the episode after Sam mentions stewardesses he claps his hands, and his seat belt (which was caught on something) moves across his chest to the regular position. Cut to a wide shot of the car and Sam's seat belt is back to the position it was in before. (00:21:05)
Someone to Watch Over Me - S2-E19
Continuity mistake: Frasier and Roz are in his booth and Roz puts her chocolate bar on the counter. While Frasier is on the radio, we sometimes see it at his left elbow and sometimes it is not, even though the angle doesn't change. (00:02:20)
Continuity mistake: Frasier gets caught in Daphne's Room for the second time and crouches down beside her bed with the quilt over his head. He then sneaks into the bathroom - the quilt is left hanging over the edge of the bed. Shortly afterwards he runs out of the bathroom and the quilt is now folded over, completely on top of the bed, even though no one went near it. (00:13:30)
The Unkindest Cut of All - S2-E2
Continuity mistake: In the opening scene, Frasier is leaning against the bookcase. There is a shot of Daphne, and after her one line the doorbell rings. The shot then cuts to Frasier who is instantly at the door, although he has not had time to get there.
Fool Me Once, Shame on You, Fool Me Twice... - S2-E14
Continuity mistake: When Daphne is telling her story about living in London, the towel on top of the laundry basket changes from being red to being blue, without her rearranging it. (00:06:15)
Flour Child - S2-E4
Continuity mistake: Near the beginning of the show, Roz takes a large get well card into Frasier's booth - she has some papers as well, which are on top of the card. She lowers the card and the next shot shows the papers are under the card, with no time for changes in position.
Continuity mistake: During the scene where Martin is apologizing to Artie in the hospital room, the photo of Artie's wife on the bedside table changes position about 45 degrees while they talk.
Agents in America, Part III - S2-E22
Continuity mistake: Roz is at Frazier's talking about a possible replacement for him at KACL. As she says "you should she her nails", her arms are crossed over her chest but in the very next shot, they are down by her sides, with no time for the change.
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.