Corrected entry: When Phoebe finds out that Phoebe at the beach is her birth mom, Phoebes twin Ursula never gets mentioned, not once. Since her birth mom hasn't seen either of them since they were born I would have thought she'd give some thought to her other daughter.
The One With The Truth About London - S7-E16
Corrected entry: Monica comes up to Chandler's room. They get in the bed and they're about to see each other naked for the first time. But Chandler gets undressed and Monica doesn't, yet Chandler can still see her naked.
Correction: She does get naked. She pulls her dress off right after getting into bed.
The One With The Flashback - S3-E6
Corrected entry: Just before Monica invites Joey in for lemonade, she says,"It's the heat. And the humidity." When she says this, if you look between the doorframe and the edge of the door, there is a crew member behind the door moving around. (00:11:00)
Correction: They live in a building with several apartments. The person in the hallway could have been another resident, a visitor to someone living there, a janitor or any number of people with a legitimate reason to wander around inside the building.
Corrected entry: When Rachel is at the airport and handing the gentleman her passport you can see that he looks and reads it up side down. You can tell this by looking at the passport photo.
Correction: A passport does not have to be rightside-up to verify that it is valid and that it is the person in the photo, especially if you read them all the time.
Correction: The second page of a passport is a picture with personal information and it's the same on the 3rd.
The One With All The Rugby - S4-E15
Corrected entry: When Ross, Emily, Phoebe and Joey go back to the coffeehouse after Ross gets the crap beaten out of him, he says to Emily "are you kidding? I just made a man twice my size cry. I haven't done that since I was four and I washed my Dad's Porsche with rocks." But in series two when Richard has a "twinkie in the city" (Monica), Jack Gellar comments on how "I turned fifty, I got the Porsche, you've got your own little speedster." If Jack Gellar was fifty when Ross was four, that would make him around seventy-six. He's looking pretty good for a 76 year-old man isn't he?
The One Where Chandler Doesn't Like Dogs - S7-E8
Corrected entry: In the beginning of "TOW Joey's Porsche", Phoebe walks in and asks Chandler and Monica if they would like to look after 3 cute puppies, and Chandler says "yeah, OK." But in this episode we find out that Chandler hates dogs.
Correction: When Chandler says "Yeah, Ok" in "TOW Joey's Porsche", you'll notice that he says it as if he's not sure. He says, "Yeah" because he loves Monica and Monica wants those puppies. Later Chandler says that he doesn't want to take care of babies because he wasn't even sure about the puppies, meaning he, in fact, didn't want to get the dogs. Also, Chandler does not hate dogs, he just doesn't like them.
Corrected entry: At one point Ross goes out with a girl whose father is played by Bruce Willis. In The One With The Nap Partners, Ross and Joey are really excited because they rented 'Die Hard' which stars, Bruce Willis. Monica's credit card is stolen in the 1st series by a woman who hated the film 'Dead Poet's Society', in a later episode Robin Williams turns up in a cameo role. It would be interesting to see who stars in those films in the Friends 'Universe'.
Correction: When Ross is going out with the daughter of "Bruce Willis", he is actually going out with the daughter of a man called Paul Stevenson. Just as in Friends 'Universe' Ross is Ross, not David Schwimmer, Paul Stevenson is Paul Stevenson, not Bruce Willis. Hence Bruce Willis can easily star in Die Hard. And same with Robin Williams and all the other special guests.
Corrected entry: When Rachel is flying to London we find out that a last minute ticket is $2700. Now even if a regular ticket was only half of that, how does Emily afford flying back and forth constantly?
Correction: First of all, she doesn't go back and forth that much, and no doubt will book a bit in advance, making it much cheaper. Most of the time she is ringing Ross, not speaking to him in person. Secondly, a family member of mine booked a flight to New York with British Airways for £199 ($300ish) return. It's hardly going to break the bank, and as we have evidence that Emily's family is fairly well off it's quite possible for her to be flying like this.
The One with George Stephanopoulos - S1-E4
Corrected entry: In the episode in series 1 where all the girls are having a sleep-over at Monica's, they're all lazing around and the camera shows Monica laying on a sofa, picking at a large bowl of cookie dough with a wooden spoon. While she is speaking, you can clearly see her accidentally flick a piece of cookie dough out of the bowl onto the floor. If this was the 'real' Monica, I'm sure she would have freaked out and cleaned it up straight away.
Correction: The girls had been drinking, so it's possible that Monica was a little too buzzed to care about it, or even notice it in the first place.
I can't recall any episode where Monica drops her neat and tidy persona. Her O.C.D. always controls her. I think the cookie dough is a mistake in the show that they let go or didn't see.
The One Where Chandler Doesn't Like Dogs - S7-E8
Corrected entry: It's mentioned a number of times that Ross doesn't like ice cream. But in the episode where Ross spends time with Marcel when the monkey is in the movie, there is a scene in which Ross and Marcel are walking down the street and Ross has an ice cream cone. Marcel starts to eat it, and then Ross laughs and throws it away. Why would he care if the monkey licked his ice cream if he didn't like it to begin with?
Correction: It is possible that Ross's tastes have changed since that episode. Many people's tastes change over time.
It wasn't about taste, it was about how it hurt his teeth because it was too cold. He probably went off it after some of it landed on his teeth. I have a similar problem. Any time it reaches my bottom 2 teeth, it stings for at least 2 minutes.
The One With Chandler's Dad - S7-E22
Corrected entry: In this episode Monica's Porsche is black, but when she got it it was a silvery-gray colour.
The One With The Inappropriate Sister - S5-E10
Corrected entry: Phoebe is collecting for charity and Monica comes to see her; a man puts a dollar in the bucket and tries to make change for the bus. When Phoebe argues with the man he says "bite me blondie", but he couldn't have known that she is blonde because she has a Santa hat on that covers her entire head and no hair is coming out from underneath the hat.
Correction: Her hair is simply not out when the guy is there. It is simply a mistake. Her hair is out in the next scene she appears in but not one little bit is out when the guy says "bite me blondie." Only way he could know is if he has seen her before and recognised her.
Correction: I thought this too, but it's clear in the next shot, when she turns slightly, that Phoebe's long hair comes out below the hat and hangs right down her back - this would have been evident from the man's point of view, even if it's not evident from the front, and therefore to the viewer.
The One With The Embryos - S4-E12
Corrected entry: The plot hinges on the girls losing the Lightning Round because they don't know what Chandler's job is, but there is no reason for it; as there was no penalty for a wrong answer, they could have simply answered wrong and moved on to the next question. Both teams had done this already, so the girls knew it was an option; they just conveniently forget it so the plot can move forward.
Correction: They knew they were running out of time and this could be their last question, so didn't want to waste time by passing, especially since they thought they knew it, or could guess. No guarantee the next question would be any easier. Entirely normal behaviour for a quiz, rather than a convenient plot choice.
The One On The Last Night - S6-E6
Corrected entry: There is zero reason for Ross to not pull the curtains in his apartment in order to hide the fact that Ben's not there. The only reason is to pull that silly gag with the pumpkin.
Correction: Except Monica was already suspicious, and if he pulled the curtains (which he clearly rarely does) she'd likely call him out as faking. He figures if he can make a "fake Ben" she'll believe his excuse.
The One Where Nana Dies Twice - S1-E8
Corrected entry: When Monica is reading about the cheap casket, in the shot from behind her there is obviously a sticky-note that has been placed in the brochure.
The One with the Monkey - S1-E10
Corrected entry: Early in the scene when Ross is introducing them to Marcel, look over Chandler's shoulder - a person is visible going into a bedroom.
Correction: This is wrong, it's Phoebe going into the room (check the clothes) after she's been speaking with the gang, she walks off.
Correction: Throughout the episode we only see a couple of minutes of interaction between the Phoebes. Ursula could have been mentioned off camera.