Buffy The Vampire Slayer S02E14

Innocence (Part 2)

Because he finds even "one moment of true happiness" in Buffy's arms, Angel's curse is nullified; he loses his soul and reverts to his former self, the vicious super-evil killer vampire, Angelus who teams up with Spike and Drusilla to have the Judge destroy humanity. Jenny Calendar turns out to be a Gypsy spy. Devastated by these betrayals, Buffy still takes out the reputedly indestructible Judge using her birthday present from Xander—a stolen rocket launcher.