Selling Out - S1-E9
Continuity mistake: Frasier meets Bebe for the first time in the hall at KACL. She has her business card in her hand for part of the scene but after Frasier tells her he has a son, the card disappears - with no time for Bebe to have put it back in her purse.
Selling Out - S1-E9
Continuity mistake: When Frasier and Niles are in the Cafe, Niles says something like "Why do you feel like that?" During this line Niles goes from putting sugar in his coffee to having the mug raised instantly.
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.