Character mistake: After Jack (who's hiding from Chrissy's mother) ducks behind the couch holding a mop, Chrissy's mother comes out of the bathroom (which from the camera angle shown is in a straight line facing the back of the couch where Jack is) and walks to the right and all the way around the couch and sees the mop behind the couch and picks it up without seeing Jack at all. From where the bathroom is, she would have just needed to walk straight for the mop and seen Jack (yet she missed him).
Character mistake: When Jack is tending bar, the one woman states margaritas don't include tequila, when it's the primary liquor.
Suggested correction: This is from s02e10, "Stanley Casanova." However, she doesn't say margarita, she says daiquiri, which is what Jack made with tequila. Daiquiris don't contain tequila but typically rum.
Character mistake: The undercover cop who first mistook Chrissy for a hooker, first admits he was wrong about the way he judged her. Then upon finding out that Jack lived with her and Janet, he came on to her instantly thinking she's "easy" once again. However, the cop was already informed by Mr. Roper that Jack was gay at this point, so the fact that a "gay" man living with women should not have changed the cop's mind of how to view Chrissy the way he did.
Good Old Reliable Janet - S3-E2
Character mistake: At one point in this episode, Jack is chatting with Larry about the nude beach and in frustration says "all the best looking girls were wearing moth-eaten blankets" right in front of Mr. Roper as well as showing interest in seeing Janet without her clothes also in front of Mr. Roper. Jack is supposed to pretend he's gay when Mr. Roper's around him. Roper luckily didn't pick up on it this one episode either time (rather showing concern for his wife).
Lee Ain't Heavy, He's My Brother - S4-E21
Character mistake: Jack's older brother Lee comes for a visit. In the second season when Jack's Uncle visits, both make note of Jack being his only nephew. Lee would be his other nephew.
Suggested correction: Although it's not stated in the show, theoritically speaking, it WOULD be accurate if Jack and Lee were HALF-brothers (with same father since both last names are Tripper) and Fremont was the brother of Jack's mother, then Jack COULD be his only nephew as Lee would have NO relation to Fremont.
I submitted the above correction based on a theory that would make it possible, although in reviewing one of the scenes involving Jack's Uncle, I realise this would not be the specific case. Uncle Fremont most likely is the brother of Jack's father (not mother like the theory) due to the fact when he tells Mr. Roper that Jack's father is happily married but that doesn't stop him from having "fun" with a friendly nudge. He most likely would not say that if it was against his own sister. So yes, the theory didn't apply in this specific situation. Instead, the situation here is during the Roper early seasons, the episode came out with the Uncle and a year or two later (during the Furley era) Lee was intruduced. Neither were ever mentioned in any other episode so it could be simple inconsistent screenwriting.
Character mistake: When Jack tells Mr. Furley his brother is in town (before mentioning it was a "twin" brother who Jack made up), Mr. Furley gave a puzzled look and said "Your brother?" which appeared as if he didn't know Jack had a brother. However, in the previous season, Mr. Furley briefly met Jack's brother Lee, so he already should have known Jack had a brother (even if were to turn out to be a different brother).
Strangers in the Night - S6-E12
Character mistake: The whole idea of the serenading scene was Larry was supposed to hide and sing for Jack while Jack would be shown in the yard alone and pretend to be the one singing, but the yard was brightly lit and Larry was right behind Jack and both were very shown with nothing to hide Larry.
Jack Goes to the Dentist - S7-E2
Character mistake: When the dentist is putting cotton in Jack's mouth he neglects to put on rubber gloves first as dentists are supposed to do before any dental work.
Jack Goes to the Dentist - S7-E2
Character mistake: Terri's boyfriend, a dentist, says he took the Hippocratic Oath then corrects himself saying it's only for doctors. Dentists also do take the Hippocratic Oath.
Diamond Jack - S7-E3
Character mistake: At the roller skating rink, Jack looks at the menu on the wall in the snack bar while ordering two sodas and says "What are they... 50 cents a piece?" However, only food items and candy are listed on the menu and drinks are not mentioned at all. How did he know the price?
Character mistake: Maria (Felipe's cousin) supposedly didn't understand any English (only single words like "yes") and would answer (in Spanish) "Que?" after a full sentence of English was spoken to her. However, in front of Jack, one of the girls said to Maria "Tell Jack the new English word you just learned" and Maria understandingly responded "No." There's no way that Maria could respond correctly to that question since she didn't understand any other English sentences throughout the episode.
Character mistake: When Felipe thinks Jack proposed to his cousin Maria, Felipe is happy and congratulates Jack. Later in the episode though, Maria's fiancé shows up and Felipe is shown as already knowing about him. Why wouldn't Felipe tell Jack that Maria was already engaged instead of showing happiness of Jack's "proposal"?
Suggested correction: You missed the entire plot of the episode. Maria's fiancé broke off the engagement, so she went to Felipe's. Then, when he thought Jack had proposed, he was happy. But Jack thought he was happy for offering her a job. Jack then begins talking about Maria as an employee (like trying her out in the kitchen and getting someone to train her). But Felipe thought Jack meant those things about Maria being his wife and got mad at Jack. Then told Jack he's not marrying Maria.
Grandma Jack - S8-E7
Character mistake: Jack says to Larry (upon finding out "Grandma" Tripper won the contest), "You want me to dress as a woman?" as if he never did that before and thought the whole idea was crazy - but earlier in the series he dressed as Chrissy in full drag so he's not new to the idea like he made it sound. Larry also dressed as a woman in an earlier episode as well (just for the record).
Character mistake: Janet is waiting for Larry to deliver her new car and states to Jack that this is her very first car. But 5 episodes earlier in S8-E13 "Itching for Trouble" when Moose asks if they had a football that needed air, Janet says no, but one of the tires on her car are low.
Suggested correction: It could have been a quick comeback line as a joke. The way Janet was even saying it sounded that way. Also, technically speaking, she did have a car in the past. The trio had bought Roper's Car for a very short time (from an earlier episode) before Roper bought it back from them. Janet never physically drove it but at that time, she was ⅓ owner of it so technically she had a car before.
Yes, I always thought it was a quick comeback.
Friends and Lovers (1) - S8-E21
Character mistake: In S5-E15 "In Like Larry", Larry gives Cindy and Janet gifts to thank them for letting him live with them, so Janet gives him a kiss. Larry also kisses both Janet and Terri on the lips at the end of S7-E6 "Opening Night" after showing them Greek dancing. However, in this episode Janet kisses Larry at her wedding, to which Larry says "Janet, that's the first time you've ever kissed me."
