Revealing mistake: When Fez and Suzy first meet, they do "12345 you owe me a coke" you can see Kelso mouthing the same line as well. (00:08:04)
That '70s Show (1998)
1 revealing mistake in season 6
Starring: Mila Kunis, Ashton Kutcher, Topher Grace, Danny Masterson, Laura Prepon, Wilmer Valderrama
Punk Chick - S1-E22
Other mistake: Jackie and Kitty are baking a pie in the kitchen and Kelso walks in. Jackie and Kelso have an awkward encounter as if they are separated, but they got back together at prom.
Kitty Forman: Oh good God, you kids switch partners more than square dancers!
Trivia: The show was originally titled "Teenage Wasteland" or "The Kids Are Alright" but those were songs by The Who and, legally, Fox couldn't get permission to use them. They renamed the show "Feelin' Alright" to show the focus groups. However, nobody really liked the name. After the focus groups airing, the audience were heard saying they really liked that show about the 70's or that 70's show - and the name stuck.
More questions & answers from That '70s Show
Answer: It's Ashton Kutcher's dog.