When Paul and Steven are in the kitchen, discussing Paul's feelings for Elyse, the water stains on Paul's shirt change in shape and location on his shirt in between shots, and in some instances, disappear altogether.
In the beginning, Jennifer opens the door for Nick and says "Hi Scott." Nick is played by Scott Valentine.
As Leland College is ficticious, there is no real way to place it. But it may be located 50 miles east of Columbus. Columbus to Lancaster is 400 miles; Leland to Lancaster is 350 miles.
Ellen leaves for Lancaster on a train evidently local to Columbus. The Columbus train station was torn down in 1979, six years before the episode aired. The nearest operating train station is Cincinnati, 100 miles away.
Dennis' college, Franklin & Marshall College, is a real college acutally located in Lancaster, Pennsylvania.
Tricia was recruited by the apparently ficticious Theta Pi Sigma sorority.