Continuity mistake: In the show from Series 7, "Big Crane on Campus", the Jean Smart character is introduced as Lorna Lenley - ex-prom queen from his high school with a volatile personality who has a brief relationship with Frasier. In Episode 21, series 8, she comes back as the same character - ex-prom queen, had a fling with Frasier, etc. - but now her name is Lana. She was billed as Lorna in the series 7 show and as Lana in the series 8 show. The names may be similar but are definitely different names.
Forgotten But Not Gone - S8-E18
Continuity mistake: While Marty and Frasier are eating Fredericka's cooking, Frasier puts his knife down on his right, then switches his fork to his right hand. After he says "motion carried," the shot shows his fork back in his left hand.
Continuity mistake: Kelly comes over to Frasier's to read a mock script for the Xmas parade Frasier wants to co-host. She puts her purse next to her on the couch but never opens it. Suddenly reading glasses appear next to the purse, which Kelly subsequently puts on to read.
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.