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".
Chosen (Buffy the Vampire Slayer)
A bloody Caleb rises and Buffy finally kills him with the scythe by slicing him in two from the crotch up. Angel has brought an amulet intended to be worn by someone ensouled, yet more than human. He tells her he will fight alongside her, but she turns him down, asking him to instead organize a second front in case she loses to The First. They discuss Spike, his soul, and Buffy's feelings for him, with Angel clearly unsettled and jealous. When Angel asks whether he has a place in her future, Buffy explains that she still needs to grow up; there might be a future for them, but it will be a long time coming, if ever. Angel walks into the shadows (as in his very first appearance), saying with a smile, "I ain't getting any older."