The Seal Who Came to Dinner - S6-E8
Continuity mistake: Marty begins to wave goodbye to Pam as she and Daphne leave, and as the shot changes, he is suddenly holding a newspaper in one hand, even though he had no time to pick it up. (00:04:50)
The Seal Who Came to Dinner - S6-E8
Continuity mistake: Niles gets out some bills to pay for his coffee and puts all of them on the table, one by one. The next shot shows him counting out his bills in his hand again. (00:02:50)
The Seal Who Came to Dinner - S6-E8
Continuity mistake: Frasier and Niles are in Cafe Nervosa talking about Niles' Dinner Party. During the scene, sometimes the lid of Niles' coffee up is on, and sometimes it is off, even though Niles never touches it. (00:02:35)
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.