Episode 22 of "Buffy, the Vampire Slayer"
s02e10 What's My Line? (2/2)

Buffy and Kendra call a truce and head to see Giles who confirms that Kendra is indeed a Slayer, called during the few minutes that Buffy died at the hands of the Master. Kendra has been trained very differently than Buffy, she has been taken from her family and has no friends but then criticises Buffy for her slaying lifestyle, causing friction between the two. Angel is saved just in time by Willy, who then turns him over to Spike. Xander and Cordelia are trapped by an assassin in Buffy's basement (the perfect setting for them to begin making out), and Oz and Willow are getting along well but are interrupted by another assassin, disguised as a policewoman who shoots at Buffy. Buffy is helped by Kendra and sees her finally as an ally. The gang find out about Spike's ritual and how it involves killing Angel. Buffy and Kendra storm into the church to rescue Angel and Spike gets a beating from two slayers this time, eventually being crippled by a falling pipe organ. Unfortunately the ritual was enough to restore Drusilla's strength and she hauls Spike out of the debris.