Season two of Buffy and season four of Angel feature storylines in which, deprived of his soul, he resumes his Angelus persona and torments and kills some of his allies.
The character's popularity led to the production of the spin-off Angel, which follows the character's struggle towards redemption after moving to Los Angeles.
In addition to the two television series, the character appears in the comic book continuations of both series, as well as much other expanded universe literature.
For experiencing a moment of pure happiness, however, the gypsy curse on Angel is revoked, unleashing his soulless alter-ego, who reunites with his old friends, vampires Spike (James Marsters) and Drusilla (Juliet Landau), and begins terrorizing Buffy and her friends.
Upon discovering gypsy descendent Jenny Calendar (Robia La Morte), who is working to translate the text of a spell to restore Angel's soul, Angelus murders her by breaking her neck, and places her body in the bed of her boyfriend, Giles (Anthony Head), for him to discover.
For the first half of the season, Angel is an enigmatic love interest for Buffy, showing up only to offer her cryptic messages about upcoming threats.
It isn't until the episode "Angel" that the character is revealed to be a benevolent vampire from Galway, Ireland, who immigrated to the United States to escape his past as the sadistic Angelus after his soul was restored by a vengeful gypsy clan.
In season three (1998–1999), episode three, "Faith, Hope & Trick", Angel is inexplicably returned from hell by an unknown party and is soon found by Buffy.
The Scooby Gang are outraged when they discover that Buffy has been secretly caring for him since his resurrection, but grudgingly accept him after he saves Willow's life in episode seven, "Revelations".
Ahead of his appearance at Australia's Supanova comic-con event this weekend, the American actor told The Project panel on Thursday: 'They want my socks! I’m a sock guy.' When the interview turned to reflecting on Buffy's recent 20th anniversary EW cover shoot, David added: 'it became this cult sensation.
''I like Paul Smith socks, so they are always asking for my socks,' David told the panel hosts. It just took all of us for a ride and it was a great time.
Angel is a fictional character created by Joss Whedon and David Greenwalt for the American television programs Buffy the Vampire Slayer and its spin-off series Angel.