An old man uses green meteor rock to reverse the aging process, then gain vengeance on the children of the jury that put him away decades earlier. Meanwhile, another woman…

Britta and Professor Slater fight for Jeff’s affection; Troy is upset when Abed doesn’t ask him to move into his dorm room.

Jeff and Britta meddle in Annie’s love life when she starts dating Britta’s ex, Vaughn. Meanwhile, Pierce feels left out of Troy and Abed’s movie night.

Jeff’s schoolmates come to his aid when they learn he is living out of his car. Pierce joins Vaughn’s band while Annie and Troy plan out his date with another…

For Professor Duncan’s psychology research team, Abed and Troy are recruited as test subjects by Annie. Also, Shirley and Jeff start to bond as they gossip about Britta and her…