Angel: Sanctuary (2000)

After Faith (Eliza Dushku) surrenders herself (see "Five by Five"), Angel (David Boreanaz) decides to try to rehabilitate her, incurring the wrath of Cordelia (Charisma Carpenter) and Wesley (Alexis Denisof), the latter of whom was recently tortured by the rogue slayer. Angel's ex-girlfriend and Faith's arch-nemesis, Buffy Summers (Sarah Michelle Gellar), arrives in town too late to warn the gang about Faith's imminent arrival. Buffy is devastated to learn that Angel has taken Faith under his wing. As Buffy and Angel battle it out, both verbally and physically, a group of assassins from the Watcher's Council attempts to recruit ex-Watcher Wesley back to their cause in order to eliminate Faith once and for all. Meanwhile, Wolfram & Hart, incensed at Faith's betrayal, turn to Det. Kate Lockley (Elisabeth Rohm) for a surprisingly legal method of revenge. As the forces against Faith continue to mount, Angel refuses to cede his protection of the girl. Ultimately, though, it's up to Faith herself to choose true penance. Originally broadcast May 2, 2000, on the WB network, "Sanctuary" marked season one, episode 19 of the supernatural comedy drama. Sarah Michelle Gellar, star of Angel's parent series, makes the second of many guest appearances (see also "I Will Remember You"). ~ Brian J. Dillard, Rovi