High Anxiety - S7-E7
Character mistake: When Jesse and Becky are in the living room with Nicky and Alex they confuse the twins when Becky tells Jesse that he can take a break and try to get Alex to use the potty because he is doing the potty dance but the kid doing the dance and the one Jesse takes upstairs is actually Nicky. This is noticeable since Alex's hair is slightly lighter that Nicky's and his cheeks aren't as chubby as Nicky's.
Chosen answer: The first time was in the first season, episode 19 "The Seven-Month Itch", the second was in the fourth season, episode 1 "Greek Week", the third time was in the fifth season, episode 19 "The Devil Made Me Do It" and finally in the very last episode of the series, "Michelle Rides Again", season 8 episode 23.
jennibee