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".
Mayor (Buffy the Vampire Slayer)
Buffy and Angel mutually but sadly concede they cannot be happy together in the next episode but they continue to work toward the goal of defeating the Mayor's plan. The two-part season finale "Graduation Day" reveals that the Mayor will be the keynote speaker at Sunnydale High's commencement ceremony, where he will be able to feed on the students after his transformation. On orders from the Mayor, Faith murders a geologist who has uncovered evidence of a previously ascended demon, then shoots Angel with a poisoned arrow to distract Buffy and the Scoobies, who have to care for, and try to save, Angel. When they learn that the only antidote to the poison is the blood of a Slayer, Buffy tries to capture Faith in order to use her blood to cure Angel. During the fight to do so, Buffy stabs Faith with the knife given to her by the Mayor; Faith escapes, but her injuries put her into the hospital, comatose. Buffy then offers her own blood to Angel, who feeds on her, then takes her to the hospital after he recovers. There, the Mayor is poignantly grieving for Faith. He discovers Buffy in the next room and tries to smother her, but is stopped by Angel.