Agents in America, Part III - S2-E22
Continuity mistake: When Frasier is watching, and complaining about Xena, his hand alternates between being on the arm of the sofa and on his leg between shots.
Agents in America, Part III - S2-E22
Continuity mistake: When he goes out of the window, Frasier takes off his tie, and there is then a closer shot of him. Suddenly his top shirt button is undone, which it wasn't in the wider shot.
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.
Agents in America, Part III - S2-E22
Continuity mistake: As Bebe says, "Darling, what you have is a fever" to Frasier, her hands are on the table in front of her. He says "what?" and the shot shows her elbows on the table and her hands are in the air, with no time for natural change.
Agents in America, Part III - S2-E22
Continuity mistake: At the beginning of the show, Niles and Frasier are in Cafe Nervosa. As Niles says "Matthew Pimm tried to stage a coup", we can see Frasier's hand on his napkin next to his mug. As the shot changes, suddenly both of Frasier's hands are on his mug.
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.