Rooms With a View (2) - S10-E8
Character mistake: In the x-ray on the right, the x-ray is flipped. The heart should be displaying on the right.
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.
A New Position for Roz - S10-E24
Continuity mistake: When Bulldog is finishing his speech at the party, Julia looks at Roz. The angle changes and Julia has suddenly turned 180 degrees.
Continuity mistake: Just after Niles has run out of Cafe Nervosa, the tip he left on the table keeps vanishing and reappearing between shots.
Some Assembly Required - S10-E19
Continuity mistake: When Frasier and Roz are at Cafe Nervosa together, just as Daphne enters, Roz's coffee cup goes from being held in her hand by her chest to down on the table in an instant.
Continuity mistake: When Niles and Frasier are first talking to one another in Cafe Nervosa, Niles' coffee cup goes from held in his hand to sat on his saucer in an instant.
The Devil and Dr. Phil - S10-E21
Continuity mistake: When Bebe is talking to Frasier, she is eating a piece of celery. The piece changes size between shots, most noticeably at the very end of the conversation when it suddenly goes from large to tiny.
A New Position for Roz - S10-E24
Continuity mistake: When Niles and Daphne are babysitting Alice, a pink feather from Daphne's boa keeps vanishing and reappearing on the side of her chair.
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.