Continuity mistake: When Niles and Roz are talking at the cabin, in some shots her sleeve is pushed up her arm and in some it is down to her wrist, with no time for her to change it.
Continuity mistake: As part of his divorce settlement from Maris, Niles gains ownership of Shady Glen, Maris' mountain home. After this episode, Shady Glen is never seen or mentioned again. What's even odder is that Niles and the rest of the characters over the years go to mountain cabins, which makes no sense because wouldn't they just use Niles' place?
Continuity mistake: Early in the show Niles and Daphne are in the kitchen talking while Daphne makes tea. She puts the lid on the teapot and in the next shot the lid is on the counter again.
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.