Continuity mistake: When Martin first finds out how Niles cured the basketball player, Niles is getting a drink, and Martin is in his chair. During the shots between them, the remote control on the table next to Martin instantly rotates between angles at least twice.
Frasier Gotta Have It - S5-E19
Continuity mistake: Roz is talking about having a fling - while she takes the notebook, which was open on the coffee table, shuts it under its own weight. She keeps talking and waving her hands around, and in the next shot the notebook is open again, even though she didn't touch it.
Three Dates and a Breakup (1) - S4-E19
Continuity mistake: Frasier's plastic container of veal rotates about 45 degrees between the time Stephanie gets up and the time she reaches to door - and no one touches it during those few seconds.
Boo! (a.k.a. I'm With Her) - S11-E16
Continuity mistake: Marty is home from the hospital and there is a basket of flowers on the coffee table. The basket moves several inches to the left while Niles goes to the door to let Ronee in.
Roz's Turn - S4-E17
Revealing mistake: Bebe is in the booth telling Frasier how she misunderstood him about Roz. As she says "wink", we can see Frasier's reflection in the booth's glass - his head bobs up. The next shot we see, though, is of Frasier's head bobbing up - shot at the same time, we just see it a split second later.
Hot Pursuit - S7-E18
Continuity mistake: When Roz is getting ready for the reception at the convention, her wrap is hung neatly over the back of the couch. After she answers the phone and passes it to Frasier, the wrap is suddenly opened up and draped much more messily over the couch. Her purse has also changed position on the coffee table.
Continuity mistake: When Frasier is hosting the Sea-Bee awards and the others are sitting at a table, there is a bucket with a bottle of champagne in front of Roz. It changes position from shot to shot, from being upright to leaning right over to the left.
Continuity mistake: Frasier is in the kitchen to get some herbal tea for Regan - the box is mauve - in the first shot it is laying on its side but after that it is standing upright, although Frasier didn't touch it during that time.
Continuity mistake: The gang from the radio station is at Frasier's rehearsing for the radio play - Gil is sitting to the right of Marty's little table - he leans towards the table and puts his hand around a bottle of water but in the next shot he is pulling back from the table with a pencil in his hand, not the water. At the same time Bulldog, next to him, while Gil is reaching for his water, is holding his own water in front of him. When Gil pulls back with the pencil, Bulldog's arm is pulling his arm back from the left too.
Three Dates and a Breakup (1) - S4-E19
Continuity mistake: When Martin and Shelly are having a fight, Frasier puts a small bag down, which is yellow on one side and has a logo on the other. He puts it down with the yellow side facing us, and for a several shots it stays like that. However, when Martin is talking about "things that bugged me," you see the bag has inexplicably rotated so the logo is now facing us.
Martin Does It His Way - S3-E3
Continuity mistake: When Niles dumps Aunt Louise's ashes out of his shoe and onto the floor, there is carpeting under the pew. In the closing credits when the janitor is sweeping up the ashes, the carpeting is in a different place.
Character mistake: When Kenny's wife walks through the door, Frasier says "Aw Janet come on" instead of calling her Janice. (00:11:41)
Goodnight, Seattle: Part 2 - S11-E24
Character mistake: Frasier says, "it's only an hour flight to San Francisco..." Seattle to San Fransisco is two hours minimum.
Something About Dr. Mary - S7-E16
Audio problem: After Mary says "Except I bet you didn't walk through a metal detector to get to class", Frasier in that shot does not move his mouth in line with the dialog that he speaks, but instead appears to be laughing. Additionally in the next shot, although his mouth now matches his dialog, he is half way out of his seat despite being sat in it in the previous shot. (00:02:15)
Audio problem: Frasier is talking to Elliot on the phone and there is a shot of Roz. In the shot of Roz, Frasier says "You know, Elliot..." and his reflection is visible in the window. But his lips on the window reflection don't move until after he says "You know, Elliot..." (00:00:30)
Visible crew/equipment: Halfway through the episode, the new station manager says she has to fire someone. If you look at the top of the screen by the white box on the wall, you can see the boom mike.
Hot Ticket - S6-E4
Character mistake: In the last minute of the show, Frasier and Niles set to leave the bar. Frasier puts money on the bar to pay and the wife comes over and talks to them. Frasier moves the remaining money to his other hand. You can see his hands slightly twitching, and he accidentally drops the money on the floor, but acts like he is putting it in his pocket instead of picking it up, and leaves.
Proxy Prexy - S10-E3
Continuity mistake: At the end of the scene where Roz is offered a melange by Daphne and Miles, and thinks they said a menage (a trois), the content of her fruit bowl changes repeatedly.
Flour Child - S2-E4
Continuity mistake: Daphne asks Frasier about his son's birth and he says that he held Frederick for the first time while Lilith was screaming at him that he would never be allowed to touch her again. But in Cheers, in the episode "The Stork Brings A Crane", we learn that A) Frasier was not present when Frederick was born and B) When he finally got to see his son for the first time, Lilith was not angry with him.
The Unkindest Cut of All - S2-E2
Continuity mistake: While waiting at the vet's office the first time, Eddie's tongue goes in or out of his mouth depending on the angle several times.
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.