In the opening scene, Steve talks about inviting his Uncle Cecil to the wedding, but in the "Paris Vacation" episode, he told Stefan that Uncle Cecil was dead.
In this episode, Carl's friend refers to Steve as the kid who blew up the science lab. Carl confirms this, however in the episode "Presumed Urkel", it was found that Steve was framed for the explosion.
In this episode, Steve proposes to Laura in the clothes that he was wearing in the "Marriage 101" episode from season 2 (the one where they were paired together in a class project). He states that he has held onto the ring that he bought her during the project until this day. He originally bought the ring as a gift for her from the "stay away" money his relatives give to him NOT to visit them. Actually, in Marriage 101, Laura says the ring is too much so he sells the ring (and a cd) to Carl to give to Harriette, therefore, he can't possibly give the ring to Laura unless he bought it back from Carl (and we know how Harriette is about rings since she pitched a fit a few episodes before this one because Carl gave her a wedding ring that he had bought for someone else).
While shopping in the mall, Myrtle says to Laura and Maxine that the clothes they are picking out "don't say Myrtle. They say 'Kelly' or 'Cherie' or some cutesy little name like that." Kelly and Cherie are "Laura" and "Maxine's" real-life first names.
How could Steve make it back home from Myra's house without his glasses? In previous episodes, such as "Fast Eddie Winslow" and "Busted," it was established that Steve couldn't see a thing without his glasses on.
After Urkel causes Carl to fall over the kitchen counter, flailing everything all over the place, a yellow bowl settles upside-down in front of a china cabinet. In an immediately subsequent shot, the bowl is gone.
Richie called Mother Winslow "Grandma." She's not his Grandma. She's Eddie and Laura's Grandma because she's Carl's mother. She can't be Richie's Grandma because Richie's mother is Rachel, Harriette's sister.
At the beginning of this episode when Steve tells Laura that he just got a job as a gift wrapper at the mall but when he said it said that he is now a "rapper" and Laura thought he was saying that he is now a singing rapper and she said that he can't even carry a tune. But how could that be when in Episode #74, "Dance to the music" that Steve wrote a rap song for Laura asking her to the Homecoming Dance for the 26th time and the song sounded like Steve carried every single tune of it pretty well.
How did Laura know OGD's real name? He didn't even tell her.
In this episode they make the viewer think that Steve is a bad basketball player but in "Twinkle Toes", Waldo, Steve, and Eddie were in a basketball game and Steve was an excellent player.
This is the first time that Steve Urkel's actor, Jaleel White, talks in his normal voice while wearing the glasses and walking normally.
When Steve is watching TV, he says to himself "let's see what's on ABC." He immediately falls asleep and begins to dream, CBS' way of getting back at ABC for the episode "Life In The Fast Lane" when Steve and Laura fell to sleep watching CBS.
While the lights dimmed when Urkel used his invention, computers somehow stay powered on.
If in episode #37, it says that Eddie was born January 28th, 1974, shouldn't Eddie's birthday already passed and he would be 23 by now?