Mindy (Janet Varney) calls Lassiter "Barnaby Jones."
Shawn tells Abigail that he would be the world's best-looking detective "if Parker Stevenson had never been born."
just before he asks his dad if he can borrow his underpants for 10 minutes -- a reference to Anthony Michael Hall's character in "Sixteen Candles", Sean says "Good talk, Dad", a reference to Anthony Michael Hall's character speaking with Chevy Chase in National Lampoon's Vacation.
Shawn mentions it to Gus.
Shawn jokingly asks Henry if he can borrow his underpants for 10 minutes.
Shawn says to Juliet, "Who hasn't seen 'The Breakfast Club'?" Shawn does the dance from The Breakfast Club on the school rooftop. Instead of wearing nametags at their school renunion, Gus chooses to wear their senior picture and Shawn instead has one of Judd Nelson.
Shawn mentions it in his speech at the reunion.
Shawn refers to his partnership with Gus as "Milo & Otis."
The episode title refers to the boring history teacher's roll call. Shawn also refers to himself as Abe Froman: Sausage king of Chicago, the character Bueller impersonates at the resturant.
Abigail (Rachael Leigh Cook) tells Shawn, who is wearing a Judd Nelson name badge, "I loved you in 'From the Hip.'"
Shawn tells Howie, "We all spent our 'wonder years' together."
Shawn says that two of his classmates at the reunion look like Andrew McCarthy and Molly Ringwald from this movie.
Shawn tells Gus that he didn't attend football games during high school because he would be missing this show on Friday nights.
Shawn says to Gus that they are following "the wrong John Hughes movie" and that "this isn't 'Curly Sue.'"
Gus tells Shawn, "Don't hate on 'Flubber.'"
As they discuss cheerleading, Shawn tells Gus that he has seen this movie.
Gus's narration at the end is a take-off on Brian's letter on behalf of the group, and Shawn pumps his fist like Bender after walking through a field.