Continuity mistake: Frazier and Marty go into the kitchen. Frazier gets out a blue bottle of water, uncaps it, puts the cap on the counter - and in the next shot we see him do the same thing again. He then goes into the living room and mistakenly tells Daphne he is going to pay for her wedding. She hugs him, and he is still holding the bottle of water. The next shot of her hugging him shows nothing in his hands, and when she lets him go, he whirls around and grabs his bottle of water off the bookcase.
Continuity mistake: Early in the show, Frasier is at home - the rest of the gang have surprised him with a birthday cake. In one shot the candles are burning on the cake, in the next Frasier is cutting the cake and the candles have disappeared, with no time allowed to remove them.
Visible crew/equipment: During the closing credits, Frasier is sitting on his couch with a platter of meat beside him. Eddie is sitting up and begging for it and while he is doing this we can see the distinct shadow of his trainer's hand and arm against the couch. The hand goes higher and Eddie waves his paws higher and as the hand goes down, Eddie lowers his paws. Eddie keeps his eye on the trainer during this whole sequence. Once Frasier gives Eddie the platter of meat, the shadow disappears.
Continuity mistake: Niles is filming is father in his recliner, trying to record his life story for posterity. Marty fakes a heart attack or death - and lies back in his chair with his left arm by his side. In the next shot his arm is crooked up around his head, but with no time for him to have moved it.
Continuity mistake: At the end of the restaurant scene, where Frasier, Roz, Martin and Roz's mother are eating, Frasier puts his crumpled-up napkin on one side of his plate, but at the end of the scene it has mysteriously switched to the other side without being moved by anyone.
Continuity mistake: Frazier meets his date (Cassandra) in the restaurant - she places her purse down, and it constantly moves around in different positions while they talk. Sometimes it's to her right, sometimes to her left, and one it is lying on the table with her hand over it.
Continuity mistake: Near the start of the episode when Frasier comes home, Daphne quickly clears all the beer cans and mess on the lounge table. After she asks Frasier how he is and he replies, "Where's Simon?". The next time we see the table the cans and all the mess on the table have reappeared.
Continuity mistake: In the doctors office, the doctor wheels Ann out and leaves the X-Ray he just put up of her leg. Later in the scene after Martin and Frasier have their conversation, Ann comes back into the room on crutches. When she does, the X-ray that was on the board has disappeared and never returns through the rest of the scene.
Revealing mistake: The guy who plays Clive in this episode has one of the most appalling accents I have heard. He's apparently from Manchester, but sounds like a sort of cockney South African. His accent slips around all the time; it's very poor. I wouldn't normally submit it, but his is so shockingly bad I doubt anyone would be fooled into thinking he was British.
Audio problem: In the restaurant Frasier says "There's an ocean of fresh fish not 15 feet away," and you can even see the blue reflection of the water and it's movement as it laps against the shore. Why then, can't you hear waves crashing at all? This is especially strange as in every other scene in this restaurant you can year it, but not in this particular one.
Continuity mistake: In the 8th episode of season 11, "Murder Most Maris", Frasier claims to have been "punched in the face yesterday by a man now dead". When he says this, two nights have passed since the murder. The next day Niles panics at the café and then sleeps for 20 hours. This time Frasier claims he was punched in the face three days ago by a man now dead, when by now it has been at least four days.
Continuity mistake: Early in the show Frasier finds Daphne's engagement ring which she had misplaced. He is holding it - on the table we can see a chip bag that Daphne had used to hide her ringless hand. During the course of the scene, the chip bag appears and disappears several times.
Revealing mistake: At the end of the episode when Frasier reveals to everyone that Roz is the one who's pregnant, we see Peri Gilpin step into the shot at the top of the stairs too early. She steps back behind the wall and then walks back out again a second later to say her line.