Immortal [ edit ] Appearances Darla has appeared in: Buffy the Vampire Slayer Season 1 (1997) - Welcome to the Hellmouth ; The Harvest ; Angel (killed). Season 2 (1997, 1998) - Becoming, Part One (flashbacks). Season 5 (2000, 2001) - Fool for Love (flashbacks). Angel   Season 1 (1999, 2000)