* Jeff talks to his former work colleague about not trying cases other than "yams and sandwiches." InThis is a reference to both "Basic Lupine Urology" (episode 17 of [[Community (season 3)|season 3]]) yamwhere Jeff is in a mock trial experimentsover arewho destroyed the group's yam experiment, and "Introduction to Finality" where Jeff spoke for Shirley against Pierce in an investigationanother ismock launchedtrial toran findby the culpritdean over who own's Shirley's sandwich shop.
* The study group's evil versionsdouplegangers cross over and return from the Darkest Timeline. The timeline wasplot firstpoint was introduced in "[[Remedial Chaos Theory]]", episode 4 of seasonthe 3third season after the roll of a die to decide who would collect the delivered pizza. Both this episode and "Remedial Choas Theory" was written by Megan Gantz.
* A continuity error is present in this episode. Greendale is listed in the closing scene right after Jeff's graduation as being "Est. 1974" yet episode 11 of season 4 "[[Basic Human Anatomy]]" had a student named Leonard who had been at Greendale since 1968.
