Continuity mistake: In the opening scene at the apartment, the mug that Ted is holding keeps changing positions in his lap between shots. Sometimes it is tucked behind the leg nearest the camera, whilst in other shots it is sat on top of that leg.
The Pineapple Incident - S1-E10
Continuity mistake: When Lily says "No dibs" and touches her nose, she does it with her right arm/hand, but in the next shot, her left arm/hand is on it. (00:05:55)
The Pineapple Incident - S1-E10
Continuity mistake: When Marshall gives Ted the phone to find out who's number is on his arm, he presses 2 buttons then gets through. No time to dial the number. (00:12:00)
The Pineapple Incident - S1-E10
Continuity mistake: When Trudy takes Ted's phone she grabs it with 2 hands. Camera cuts and now she has one hand on her face. (00:17:35)
The Pineapple Incident - S1-E10
Continuity mistake: When Ted is explaining to Robyn about Trudy he points at the door. Camera cuts and his arm has been lowered. (00:20:20)
Visible crew/equipment: When Marshall runs through the smoke towards The Limo, you can see the fog machine in front of Barney's head used to create the "smoke" effect. (00:17:40)
The Wedding - S1-E12
Continuity mistake: In the first scene at the bar, as Ted heads off to speak to Robin, Marshall's beer goes from at his mouth to on the table instantly between shots. (00:02:15)
The Wedding - S1-E12
Continuity mistake: In this episode, Lily is in Robin's house with her dogs. In the episode "World's Greatest Couple", Robin reveals that Lily can not stay at her apartment because Lily is allergic to dogs.
Suggested correction: Doesn't mean Lily can't go over and visit for a while. My mother is allergic to cats. She can visit her cat-owning friends for a while, though she would never stay overnight. Pet allergies can be pretty controllable, as long as you're not constantly in contact with the animal.
The Wedding - S1-E12
Other mistake: On The Wedding invitation it says the year is 2005, when it should be 2006 since the last episode was New Years.
The Wedding - S1-E12
Plot hole: After Claudia's call, they decided that Lilly will meet her at the bar and the guys will meet Stuart. They're all at the apartment at the same time and the dudes have gotten to Stuart's apartment, convinced him to still marry Claudia and then go back to the bar right after Lilly gets there. And also giving a lot of time to Barney hitting on Claudia. There's no way that could happen in this order, they live right above the bar, Lilly was supposed to be there before Claudia.
Continuity mistake: In the previous episode "The Wedding", Ted and Victoria first see each other whilst Ted and Barney are sitting together and both drinking champagne. In this episode, when the same glance is exchanged, a bridesmaid is sitting with Ted and Barney, and Ted is now drinking what appears to be whiskey. (00:01:00)
Continuity mistake: When Ted and Victoria are first talking, the straps on her dress keeping changing position between shots. Sometimes they are starting to slip off her shoulders, sometimes they sit straight, without her every adjusting the dress. (00:02:10)
Continuity mistake: The morning after The Wedding, when Lily is talking about throwing the bouquet, the mug in Marshall's hand changes position, vanishes and then reappears instantly between shots. (00:05:20)
Continuity mistake: When Lily and Robin are talking at the apartment, Lily's necklace keeps moving from on top of her jacket to hanging straight down over her dress.
Continuity mistake: When Robin and Barney meet up for drinks, the amount of ash on the end of Barney's cigar goes up and down frequently between shots. (00:06:10)
Continuity mistake: When Robin leaves to get Battleship, Barney thinks they're going to have sex, whips his belt off, and throws it on the floor. When Robin returns, he's neatly folding his pants and draping them over a chair, and his belt is still threaded through the loops. (00:16:20)
Suggested correction: He could have easily done that himself so it was easier to put back on afterwards.
This correction is too much of a stretch. It would make no sense for him to take off the belt and throw it to the ground in the first place. He was alone at that point, so he wasn't doing it to impress anyone and he's been in this position before.
Continuity mistake: When Barney is pointing out the woman in the blue shirt at the bar, Robin's drink changes from one hand to the other to the bar between shots.
Game Night - S1-E15
Continuity mistake: In the flashback we see Barney get handed a crumpled flyer. When we see the close up of the flier it is no longer crumpled up. (00:14:00)
Game Night - S1-E15
Continuity mistake: When Barney holds out his phone to show the video of himself with Shannon, it repeatedly switches between his left and right hands. (00:19:30)
