Goodnight, Seattle (2) - S11-E24
Continuity mistake: When Eddie eats the wedding ring at Martin's wedding, there's no food on his plate, next shot there is.
Continuity mistake: After Martin lowers his chair and gets the bag of pretzels it cuts back to Frasier and you can see the bag still on the coffee table. Then it cuts back to Martin and he has the bag. (00:06:16)
Revealing mistake: It's clear the "Manchester" pub scene was filmed in the United States, as the pint glasses used are American pints and not imperial pints as used in the UK, which are approximately 20% bigger.
Continuity mistake: When Frasier is asking Noel for a favor, Frasier sets papers down on the desk which move from place to place and even disappear and then reappear between camera shots.
Roz, a Loan - S6-E9
Continuity mistake: The bag of beauty products changes, one with a logo and one without.
The Botched Language of Cranes - S2-E6
Plot hole: Several times throughout the show, it's bought up that there is a seven second delay on Frasier's show at KACL, which, among other things, would allow Roz to "dump" the last seven seconds of what's been said and prevent it from being broadcast. When Roz notices that Frasier is still on the air during his rant, it takes her about nine seconds to get back to her console, so she should have been able dump the last seven seconds of his rant, leaving only the first few words of Frasier's rant (likely no more than "Good Grief, have you...") going to air, which would be much less awkward compared to his entire rant. (00:09:20 - 00:09:50)
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.