At 10:14, when the lifeguards can be seen lifting up their orange flotation devices to signal each other, the lifeguards are Shauni (Erika Elaniak) and Eddie (Billy Warlock) even though they have been off the show for over a season at this point. It may have been reused or unused footage from before.
Some of the footage from Stephanie's audition was later used for Alexandra Paul's credit shot in the fifth season.
Dolph Apolganger's name can be shortened to D. Apolganger. According to myth, a Doppelganger is a ghost who is the double a of a living person. Dolph tries (and fails miserably) to be a double of Mitch.
For some reason, syndication skips this episode and shows it after the episode Guys and Dolls.