The T-shirt that Bucket Head is wearing is a "Big Johnson" shirt, a 1990s clothing fad that had sexual innuendos on every shirt - yet another allusion to the raiders falling into normalcy.
Rick's nod to E. B. White is a reference to the fact that White revised a book called The Elements of Style, which dealt with extremely specific rules on which words to use where.
In the Blood Dome, Morty's arm does the ear cupping gesture that professional wrestler Hulk Hogan used to use as part of his performance, as well as the "You can't see me" gesture used by professional wrestler John Cena.
Includes an appearance by Joel McHale, who previously starred in another Dan Harmon created show, Community (2009), as Jeff Winger.
This is the second episode where Summer can be seen with her hair down.