The study group returns to find a new vice dean, and Jeff clashes with the new biology professor at Greendale Community College.

Special features: Commentaries; A Glee-ful community Christmas; This is war: Pillows vs. Blankets; Outlakes; deleted scenes, Walter had his own thing going on; Urban matrimony and the sandwich arts.

Disc 1. Biology 101; Geography of global conflict; Remedial chaos theory; Competitive ecology; Horror fiction in seven spooky steps; Advanced gay; Studies in modern movement; Documentary filmmaking redux -- disc 2. Foosball and nocturnal vigilantism; Regional holiday music; Contemporary impressionists; Urban matrimony and the sandwich arts; Digital exploration of interior design; Pillows and blankets; Origins of vampire mythology; Virtual systems analysis -- disc 3. Basic lupine urology; Course listing unavailable; Curriculum unavailable; Digital estate planning; The first Chang dynasty; Introduction to finality.