Continuity mistake: Frasier is leaving the booth - Roz is standing there holding several tapes in her hand. When the shot goes back to her, she has papers in her hand and there's no sign of the tapes. In the next shot, the tapes are suddenly on top of the tape machine.
Our Father Whose Art Ain't Heaven - S4-E8
Continuity mistake: Martin and Frasier are in the restaurant and Marty says "you're eating light" as Frasier has his menu up at chest level. The next shot, without enough time for change, shows the menu lowered several inches and held at a different angle.
Three Dates and a Breakup (1) - S4-E19
Continuity mistake: Frasier and Daphne are on the elevator; Daphne has a bag of groceries. In some shots several inches of a loaf of French bread is seen, but when she gets off the elevator the bag is sealed up with no bread visible. The bread becomes visible again in later shots as they talk at the door and go into the apartment.
Continuity mistake: While Niles, Daphne, and Clive are sitting on the couch talking, the large book on the coffee table goes from closed to opened during the scene, even though no one touches it.
Continuity mistake: Just before Eddie drops his master's slippers by his chair, Marty moves his cane over to the other side of the chair. The handle is facing outward, but when the shot changes, it is now towards the couch, even though Marty didn't touch it again.
Audio problem: As Frasier says, "Well, let's shoot it to the news," we can see his reflection in the booth, but his lips aren't moving as he speaks.
Continuity mistake: When Frasier is in the men's room crying to Frasier about Sharon, he has toilet tissue in his hand which sometimes is bunched up and sometimes is hanging about 10 inches down, even though he never changes it.
Continuity mistake: The gang is reading through the script and Roz cues Bulldog and as she does we can see Gil has his script opened up on his knee. As the shot goes to Bulldog, Gil's script is now folded over and his pencil is in his right hand. He wouldn't have had time to change position.
Other mistake: When Frasier enters the apartment, Martin and Sherry are talking in the kitchen. If you listen carefully to what they're saying, their conversation makes no sense. Martin says something along the lines of "Daphne is really a very nice girl" before suddenly, in a very different tone of voice, he says "You're right, we're not getting enough privacy around here". Seems like a big chunk of conversation was edited out.
Continuity mistake: Martin goes out to a baseball game with a famous writer that Frasier and Niles admire. While he is out, they read one of his books he accidentally left behind. When the author returns, he ends up holding the pages of the book in his hand, whilst standing in front of the fireplace. In one shot he is holding them in his left hand, but when the view cuts to another angle, he has them in his right hand. This occurs just before he goes outside to throw the pages off the balcony. (00:20:25)
Continuity mistake: While Marty and Daphne are watching the basketball game on TV, he says "it's completely different", the remote suddenly appears on the table beside him; it wasn't there before and wasn't in his hand. A couple of shots later, when he yells "unbelievable!" it's gone again.
Dad Loves Sherry, the Boys Just Whine - S4-E9
Continuity mistake: When Sherry brings in the bottle of wine, it's in a paper bag which is twisted around the bottle when she puts it on the coffee table. The next shot shows the bag has been loosened around the bottle and is quite wrinkled. No one touched it in that short time.
Dad Loves Sherry, the Boys Just Whine - S4-E9
Continuity mistake: When Sherry first meets Frasier and Niles, she puts her coat down towards the center of the couch. A few shots later, although no one has moved it, it shifts to the left and her purse, which wasn't visible before, can be seen.
Dad Loves Sherry, the Boys Just Whine - S4-E9
Continuity mistake: In Frasier's apartment, Sherry has just been introduced. Marty has a glass of wine down on the dining room table, next to another one. In the next shot the glass has shifted considerably, but the camera angle has remained the same.
Liar! Liar! - S4-E10
Continuity mistake: At the beginning of the show, the KCAL gang are in Frasier's apt. celebrating the SeaBee awards. Bulldog is gloating about his win. At one point he has his left hand out in front of him and up in the air - the next shot the same hand is behind his back.
Continuity mistake: When Lilith and Frasier are at Dr. Campbell's (the first time), he makes them tea. A shot shows him preparing it, pouring it, etc. But in the next shot, Frasier and Lilith are already holding their cups. There was not enough time for him to have passed them the cups.
Dad Loves Sherry, the Boys Just Whine - S4-E9
Continuity mistake: Frasier tells his father Maureen wants to break up with him, and Marty heads for the kitchen, leaving his blue container of stomach medicine on the credenza. But as Marty passes by the dining room table, he suddenly has the container in his hand again.
To Kill a Talking Bird - S4-E14
Other mistake: It seems very out of character for Niles, who is so obsessed with cleanliness, to be happy with having a bird flying loose in his kitchen.
Roz's Turn - S4-E17
Continuity mistake: When Frasier is comforting Roz about not getting the job, the blue cassette on top of the tape machine moves from one end to the other, and the white label on the end is no longer visible.
Three Dates and a Breakup (1) - S4-E19
Continuity mistake: At his party, Frasier's bragging to Niles how he's catnip to women while Niles is holding his glass in his left hand. As he replies, "I think I feel a hairball coming up", his wine glass switches to 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.