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".
Angel (1999 TV series)
Much like "Buffy", "Angel" is told in a serialized format, with each episode involving a self-contained story while contributing to a larger storyline. Unlike "Buffy", however, the season-long narratives are not marked by the rise and defeat of a powerful antagonist, commonly referred to as the "Big Bad" in the parent series. Instead, the overarching story of all five seasons of the series pitted Angel as the central player in a battle between the "good" Powers That Be and the "evil" law firm Wolfram & Hart and his possible role in a prophesied apocalypse. It mixes the complex, series-long storyline along with more stand-alone, villain-of-the-week episodes. The show blends different genres, including horror, fantasy, supernatural, and a combination of comedic and dramatic content.