Continuity mistake: When Frasier is saying goodbye to Mr. Rugly, he knocks over Mr. Rugly's coffee mug with his umbrella. The mug is tipped off the table but in the next shot Mr. Rugly grabs it - but in real time, by this point the mug would have already hit the floor.
Continuity mistake: During the closing credits, Roz is sitting at in Cafe Nervosa with her little black purse on the table. While she is preparing her coffee and flirting across the room at a guy, her purse disappears from the table for the rest of the scene.
Continuity mistake: Niles runs into the kitchen where he finds Frasier cleaning the oven. As Frasier stands up, one of the cuffs on his rubber gloves has been turned over, and the other hasn't. A couple of shots later they are both neatly folded over. As Frasier leaves the kitchen, they are back to the first position. At no time did he adjust them.
Continuity mistake: In the opening scene, Niles goes to pour sugar on his spoon and the top of the sugar dispenser comes off and disappears - it looks like it goes into his lap. We don't see the top again until after the teenager says, "Aren't you going to yell at them?" and suddenly it is in plain view, on the right of the table.
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.