10/05/1999: The Freshman (episode 4ABB01)
Buffy adjusts to college life and contends with an unstable roommate.

10/12/1999: Living Conditions (episode 4ABB02)
Buffy's friends help contend with her roommate; Buffy becomes attracted to an older classmate.

10/19/1999: The Harsh Light of Day (episode 4ABB03)
Spike (James Marsters) returns to Sunnydale in search of a relic that gives the wearer unimaginable powers.

10/26/1999: Fear, Itself (episode 4ABB04)
Buffy, Willow, Oz and Xander get trapped in a haunted fraternity house on Halloween.

11/02/1999: Beer Bad (episode 4ABB05)
Buffy goes drinking with a group of upperclassmen; Oz grows interested in a new performer.

11/09/1999: Wild at Heart (episode 4ABB06)
Buffy discovers that Oz is drawn to woman who is a werewolf.

11/16/1999: The Initiative (episode 4ABB07)
A commando squad holds Spike captive for a mysterious laboratory beneath the streets of Sunnydale.

11/23/1999: Pangs (episode 4ABB08)
Indian spirits arise on Thanksgiving to re-create wrongs done to their people; guest David Boreanaz.

11/30/1999: Something Blue (episode 4ABB09)
Willow's spell goes awry, causing Buffy to fall in love with Spike.

12/14/1999: Hush (episode 4ABB10)
Sunnydale residents lose the power of speech; an enemy must steal human hearts to stay alive.

01/18/2000: Doomed (episode 4ABB11)
Buffy and the gang return to Sunnydale High to prevent an impending apocalypse.

01/25/2000: A New Man (episode 4ABB12)
Buffy and Riley's romance grows; Giles, transformed into a demon, eludes Buffy.

02/08/2000: The I in Team (episode 4ABB13)
Buffy's involvement with Riley and the Initiative hurts her friends.

02/15/2000: Goodbye Iowa (episode 4ABB14)
Buffy's investigation leads her to the Initiative's secret weapon; Riley challenges Buffy.

02/22/2000: This Year's Girl pt 1 (episode 4ABB15)
Faith (Eliza Dushku) awakes from a coma and seeks revenge.

02/29/2000: Who Are You pt 2 (episode 4ABB16)
The Watcher's Council plans to send Buffy to England; Faith damages Buffy's relationship with Riley.

04/04/2000: Superstar (episode 4ABB17)
Buffy tries to figure out why the town thinks a former high-school nerd is now a superhero.

04/25/2000: Where the Wild Things Are (episode 4ABB18)
Buffy and Riley unleash a powerful supernatural force.

05/01/2000: New Moon Rising (episode 4ABB19)
Oz returns to Sunnydale claiming that he still loves Willow.

05/09/2000: The Yoko Factor (episode 4ABB20)
Riley and Angel battle for Buffy's heart; Spike and Adam devise a plan to tear the Slayer from her gang.

05/15/2000: Primeval (episode 4ABB21)
Buffy's estrangement from her friends threatens the prevention of Adam's (George Hertzberg) plan to design a master race of human/demon hybrids.

05/22/2000: Restless (episode 4ABB22)
Buffy, Willow, Xander and Giles face their fears in nightmares.