... studies

1: Pilot

2: Top Banana

3: Bringing Up Buster

6: Charity Drive

Buster breaks an ancient skull with a hammer at an archeological dig.

Related Joke: ... has a rock

10: Pier Pressure

Buster got an incredible case of the munchies after enlisting in a marijuana study.

15: Staff Infection

19: Best Man for the Gob

Lupe wears a sweatshirt from Buster's alma mater, The Stanford Institute of Cartography.

Related Joke: Lupe's hand-me-downs (background)

8: Queen for a Day

Buster's room has a display of spearheads, a reference to his post-graduate studies.

1: The Cabin Show