Character mistake: Geraldine's name changes from "Boudicca Geraldine Granger" to "Geraldine" but with multiple middle names from Mary Poppins with the surname "Granger."
When in Rome - S1-E3
Character mistake: Nobody in this scene knows how to dance the tango that is playing. (00:16:35)
Character mistake: When Mrs. Bun asks the dining lady if she has anything without spam in it, she forgot about egg & bacon, and egg, sausage & bacon. Those had no spam in them.
Character mistake: Max enters Brad and Jane's house to find Brad dancing with Santa, Max then calls Brad "Dave." (00:09:18)
Character mistake: Edith says in a story that Archie has a brother Phil. In actuality Archie had 1 brother, Fred.
Character mistake: Bessie's last name is misspelled "Higginbottom" on the newspaper Happy shows her.
Character mistake: Rufus says "That was before I found out you raped my 14 year old daughter." referring to Jenny. Jenny, in previous seasons is 15. Jenny was born in 1993, and season 4 was filmed in 2010, making Jenny 16 at least. (00:25:35)
Suggested correction: In this scene, Rufus saying, "my 14 year old daughter..." was referring to Jenny's age at the time Chuck tired to force himself onto her (beginning of the first season), not her current age in season 4. Jenny was 14 in the beginning of season 1.
Annette Castellano Is My Nemesis - S3-E2
Character mistake: At the end of the episode, Danny says "Can we not do this in front of Bernard King?" referring to a poster on the wall of Danny's childhood bedroom. We can see the player in the poster is wearing the number 15 and is actually Earl Monroe, not Bernard King who wore the number 30.
Character mistake: Eddie, Spudgun and Dave Hedgehog all appear worried at the fact that the devil takes "virgin's blood." However, it is apparent later in the episode that the 'devil' is in fact Dave Hedgehog's daughter, meaning he isn't a virgin.
Suggested correction: Also, Eddie previously slept with the Third Viscountess of Moldavia when Richie's back alley kidney donation backfired and he collapsed, so he wasn't a virgin either, but reacted as though he was.
Although theoretically correct, bear in mind that neither Eddie or Dave Hedgehog aren't particularly bright, and likely forgot they weren't virgins.
Hedgehog's daughter could have been adopted.
Character mistake: When Tam shows off his GFT Platinum Pass to Jack and Victor, it reads as 'Plantinum Pass'. (00:06:29)
Welcome to the Great Beyond - S7-E4
Character mistake: Calvin is cleaning a gas BBQ grill, and they refer to it as a smoker. (00:00:26)
Character mistake: Marvin states Laurie's eyes are green, when in fact Susan Dey's eyes are blue.
Invasion of the Ferb Snatcher/Ain't No Kiddie Ride - S2-E28
Character mistake: In 'Ain't No Kiddie Ride' Carl reminds Major Monogram that he has no sense of smell and that he was born without nostrils noting it on his resume. But in 'Brain Dead' when Major Monogram sees Perry wearing a face mask he points out that Carl is also a germaphobe. Carl corrects him saying "It's not the germs sir, it's the garlic smell." He wouldn't be able to smell anything since he has no nostrils. (01:10:00 - 01:35:00)
Transformers (Lost episode) - S1-E7
Character mistake: When Donnie turns to the cameraman, Carl, and asks if he liked the film they just made, he responds in a normal American accent. Carl has been established in the series as German with a thick German accent, and the actor playing him, Rob, either forgot to use the accent or just didn't at that moment with them forgetting to change the audio in post. (00:03:55)
Character mistake: Mike is holding and talking about his .59 caliber flintlock and refers to placing a percussion cap on it to fire it. A flintlock does not use a percussion cap.
Character mistake: Bret fires at "John Wesley Hardin" four times, but the doctor and all the witnesses say there were three shots.
School Elections & Talent Show - S1-E8
Character mistake: There is a campaign poster that reads, "Vote for Ned or Your Dead." "Your" should be spelled "You're."
Character mistake: Levitt is often seen wearing a cap device as a shield (badge). This is a big no in the NYPD.
Character mistake: In Season 5, Episode 4 ("The Heart Attack Boys"), Abishola twice gives Christina an injection without swabbing her skin with alcohol. Abishola is an RN and would never make that mistake.