Continuity: The number of the flats near the start of the first series was 4 and 5. After a few shows they changed to 19 and 20. [The producers realised that the numbers 4 and 5 were for apartments on the lower floors and had shown Monica's apartment to be much higher up so they changed the numbers - it's still a mistake but there's the reason.]

Continuity: In the pilot episode, the guy Rachel left at the altar is called Barry Finkel. In all the other episodes his name is Barry Farber.

Continuity: Mr Heckles's apartment number changes from 8 to 5. Submitted by Duff "King Of Beers" Mckagan

Continuity: The door to Monica's bedroom is shown open, then closed, then open, and then closed during the scene in which Paul arrives for their date. (Time)

Continuity: In the scene where the friends scoot the table over to see Monica's date with "Paul the wine guy", the cup in front of Chandler changes position. (Time)

Continuity: At the end of the episode when Ross picks up his jacket, there is a blue bowl on the small table by the pillar and nothing on the main kitchen table. In the next shot, the blue bowl has moved to the large table. (Time) Submitted by Legend

Continuity: When Monica is saying bye to Paul, Paul goes to the screen left but the stairs are at the screen right. (Time) Submitted by Duff "King Of Beers" Mckagan

Continuity: When Ross, Chandler and Joey are setting up Ross' furniture and Ross is bent down saying, "And I cannot feel my legs," Ross is holding a manual. When it cuts, the manual is on the floor. (Time) Submitted by Mortug

Continuity: At the end of the episode, as a customer in Central Perk asks Rachel for more coffee, Chandler has set his cup of coffee on the table. In the next shot, he is holding it again. (Time) Submitted by Legend

Continuity: When Monica asks Ross, 'Do you want me to stay?', her hands are in front of her, not touching Ross. In the next shot, her right hand is holding onto Ross's wrist. (Time) Submitted by Legend

Continuity: At the end of the episode when Chandler says "I'm in Las Vegas" Rachel starts to pour his coffee. In the next shot they have moved apart instantly and Chandler is putting his cup down. (Time) Submitted by Legend

Continuity: When Rachel loses the ring near the beginning, Chandler and Joey get off a chair to help look. But then the shot cuts to Monica, and behind her you can see Chandler at the fridge without enough time to get there. (Time)

Continuity: When Ross arrives at Monica's apartment, both Ross and Monica walk past the beam in the middle of the room. In the next shot as they continue walking they walk past the beam again. (Time) Submitted by Legend

Continuity: When we first see Ross at the museum, the woman he works with is holding a rock. In the first shot, she is holding onto it with her right hand at the bottom and just before the shot changes she turns away from Ross. In the next shot, she is facing Ross again and her right hand has moved on top of the rock. (Time) Submitted by Legend

Continuity: At the very start of the episode, Monica holds up both of her hands. In the next shot her right hand is wrapped around her legs. (Time) Submitted by Legend

Continuity: At the start of the episode when Chandler is talking about Pink Floyd, his legs are both on the table. When the shot changes, his right leg is resting on his left knee. (Time) Submitted by Legend

Continuity: At the end of the episode when Phoebe asks Monica if Alan mentioned them, the towel on the table is next to Phoebe and is untidy. In the next shot, it has moved closer to Chandler and is folded neatly. (Time) Submitted by Legend

Continuity: When Chandler smokes the cigarette at the start of the episode, keep an eye on Joey's arms. First he moves his arms between his legs, then his left arm moves onto his knee between shots. (Time) Submitted by Legend

Continuity: When we first see Chandler in his office, his sleeve is rolled below his elbow. In the next shot, it is above his elbow. (Time) Submitted by Legend

Continuity: After Chandler shouts at everyone because they are complaining about his smoking, there is an awkward silence and we see a shot of Rachel leaning on the sofa with her arms spread. In the next shot she isn't leaning on the sofa anymore. (Time) Submitted by Legend