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".
Sanctuary (Angel)
Detective Kate Lockley, guided by Lindsey's information, arrests Angel for harboring the fugitive Faith. When Angel and Kate, with Wesley and Buffy in tow, arrive at the police station, they are surprised to see Faith is voluntarily confessing to her crimes. Later, Buffy admits to Angel how hard it was for her to see Faith with him. Angel counters by saying it was not about Buffy, it was about saving Faith's soul. Buffy proceeds to explain that she had come because he was in danger, but Angel knows that she was merely using this as an excuse to get revenge on Faith, which she does not deny. Buffy lashes out by telling Angel she has someone else in her life, and unlike her relationship with Angel, she can trust her new boyfriend. In response, a furious Angel launches a tirade against Buffy, reminding her that, while it's great that she has moved on, he himself cannot and has no one to share his pain, climaxing when he informs Buffy that they lead their own separate lives now and that she has no right to just show up with her "great new life" and tell him how to do things before harshly ordering her to go back to Sunnydale. Buffy complies after a slight hesitation, complaining that "Faith wins again". As soon as she is gone Angel regrets his harsh words and decides to head to Sunnydale to make his own amends. Meanwhile, Faith manages to find peace in her jail cell.