Three Dates and a Breakup (1) - S4-E19
Continuity mistake: At Cafe Nervosa, while Roz is praying her old school mate won't recognize her, there is a crumpled up red napkin on the table. When he comes over to talk to her, it has magically disappeared.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: While Marty and Frasier are fighting Marty smashes some plates. The shot changes to the living room with Frasier apologizing and then switches back again. However, now all the smashed crockery has disappeared to be replaced by what looks to be a bowl and a tumbler.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: As Frasier pushes Sherry towards the balcony, we can see a gold decorative thing on her green purse. In previous shots to this, the gold piece didn't show, because the other side of her purse was facing out. At no time did she turn the purse around.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: Niles and Frasier have drugged the rottweilers with some of Maris' pills and Frasier points towards the french doors and says, "The dogs are getting drowsy." We see the dogs dropping to the ground. The next shot of the doors, a couple of seconds later, shows no sign of the dogs, although they were visible from that angle just before that.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: While Frasier and Marty are in the kitchen arguing about Sherry, his can of beer moves from the right side of the counter quite a distance over to the left of the dishes he broke. The sugar bowl and jam pot also change positions during the same shots.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: When Marty is explaining why he broke up with Sherry, we can see his blue jacket hanging up on the book by the fireplace - as he says "I said it back", the coat is no longer there. It does reappear in later shots.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: Frasier's third date, Leslie, shows up at his apartment wearing a long off-white coat. He hangs it up beside the fireplace; for the rest of the scene we sometimes see the coat hanging with the left sleeve straight and sometimes with the left sleeve all crinkled up.
Continuity mistake: During breakfast, there is a bowl of scrambled egg next to Martin that moves itself around, and at one point the fork in it just vanishes and then reappears.
Continuity mistake: Towards the end of the show, Daphne, Niles, Sherry, and Martin are in Frasier's bathroom where he is trying to take a bath. He starts talking to Sherry - she is sitting on the ledge at the end of the tub. From one shot to the next she has her left leg crossed over her right, then her right over her left, and then both legs uncrossed. She did not have time to shift her position and there is no "residual movement" that would have been natural had she been fidgeting while he talked to her.
Continuity mistake: When Frasier and Marty are sitting at the breakfast table, talking about the weather, Frasier's newspaper is sometimes folded over and sometimes not, although he never changes it from shot to shot.
Continuity mistake: Marty, Daphne, and Sherry are all shouting at each other around the dining room table - there are two chairs between Martin and Daphne but when the shot changes to Frasier coming in, now Marty and Daphne have no chairs between them.
Continuity mistake: While Daphne and Sherry are arguing, Marty says, "See, I'm regretting that one already", and his rolled up exercise mat, sitting on the table, rotates about 45 degrees.
Continuity mistake: During the bathroom scene where Frasier is in the bath talking to everyone, the bubbles on his face and shoulders change in position and amount from shot to shot.
Continuity mistake: During the breakfast scene Marty's cane is leaning against the table in the same spot, but sometimes there is a bowl of lettuce next to it, and sometimes a bowl of cheese.
Continuity mistake: In this scene, Martin and Daphne are arguing about Martin buying the gift basket for Daphne because Daphne knitted the sweater for Martin. Daphne says the basket cost too much, so Martin begins to take items from the basket and put them on the table. Then as the argument progresses Martin and Daphne decide to take back their gifts. Martin places the gift basket on his chair (the two items that were taken from the basket are still on the table) and Daphne takes the sweater. A minute later they make up and agree to re-exchange the gifts. Daphne gives Martin his sweater and when Martin reaches for the basket, all items are there, including the ones that were still sitting on the table when he put the basket on the chair.
Continuity mistake: During the closing credits, Niles brings a breakfast tray into his dining room and puts it down in front of Marta, who is reading a newspaper. When she puts the paper down, there is a rose lying on the tray - in the previous shot there had been no rose, but there had been several pill bottles there which have mysteriously disappeared.
Continuity mistake: When Frasier is in his car with the woman, her seatbelt changes several times between shots. At least once it's off then on almost instantly, and sometimes it's under the lapel of her coat and then suddenly on top of it.
Odd Man Out - S4-E24
Continuity mistake: Near the start of the show, when Frasier is checking for phone messages, his raincoat hanging up in the background sometimes has a bunched up sleeve and sometimes doesn't.
Frasier's Imaginary Friend - S5-E1
Continuity mistake: When Frasier is talking to Niles and Martin in the restaurant (when he is supposed to be meeting Kelly) and the level in his wine glass alternates between being half full and almost empty and back again.
Frasier's Imaginary Friend - S5-E1
Continuity mistake: When Frasier gets up to get out of the plane seat between the married couple, he is clutching his coat and boarding pass in his left hand/arm but when he reaches the aisle, they are in his right hand.
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.