Jeff contemplates graduation from Greendale, while the study group grapples with the return of the Darkest Timeline.
Abed becomes convinced that the study group was destined to meet at Greendale and pieces together everyone's past - revealing that their lives have been intertwined for years.
Annie and Shirley plot to win the spot of class valedictorian, while Troy and Abed accidentally switch bodies.
Jeff's holiday party goes south when Annie secretly invites Professor Cornwallis.
The gang gives puppet therapy a try after they accidentally reveal their darkest secrets.
When Annie discovers the study group's yam experiment smashed to smithereens on the science lab floor, the group mobilizes to expose the criminal and save their grade.
Jeff Winger is on the hot seat when it appears he's fabricated a class for credit.
It's every man for himself when GCC is overtaken by an epic game of paintball!