Angel (season 1)
At the end of the third season of "Buffy", the 242-year-old, re-ensouled vampire Angel left Sunnydale to give teenage Slayer Buffy Summers the chance to live a normal life. Angel is now living in the big city of Los Angeles. With Buffy gone Angel is now completely cut off from society, every day getting closer and closer to giving in to his vampiric hunger. It's not until he befriends the half demon and fellow Irishman Doyle, who is sent visions of people in trouble by The Powers That Be, and fellow Sunnydale resident Cordelia Chase, who grounds Angel's life in the humanity around him, that he truly begins to take charge of his life and seek atonement for his past sins. He sets up his own detective agency, Angel Investigations and begins to "help the helpless".
Buffy the Vampire Slayer Season Ten
Angel begins as the self-appointed guardian over London's new Magic Town ghetto created by events of "Angel & Faith" in the previous season, while Faith is on a journey to find herself, initially in the United States. Many of the town's residents have mutated into magical creatures, and Angel is forced to adjust to this new status quo, making an ally in London police officer Detective Brandt and relying on previous local friends Alasdair Coames and the Fairweather sisters Lavinia and Sophronia. He learns that the aggressive Slayer Nadira has survived her injuries at the conclusion of "Season Nine" and mutated into a benevolent seer who can commune with the unique magic of Magic Town, which she says is sentient. Angel is initially frustrated by the half-demon Pearl from "Season Nine" and a plot run by mutated magical pixies that leads him to the witch Amy Madison. Amy is vengeful for the events of "Season Eight", and has gained great power from Magic Town's energy intending to kill Willow. However, Nadira easily overpowers Amy. Soon after, Angel is stunned to find his deceased friend Fred Burkle walking the streets – alive following the events of "Buffy" in "Season Nine", when Illyria, the demon wearing Fred's former body, appeared to die during the event which restored magic to the world.