Alyson Hannigan 1989, her first regular role on a TV series came when she was cast in the short-lived ABC sitcom "Free Spirit". As a teenager, Hannigan babysat for the children of her future "How I Met Your Mother" costar, Bob Saget. In 1997, Hannigan was cast to play Willow Rosenberg, Buffy Summers' best friend, on the television series "Buffy the Vampire Slayer". The show became a success, and Hannigan gained recognition, subsequently appearing in several films aimed at teenaged audiences, including "American Pie" (1999), "Boys and Girls" (2000), "American Pie 2" (2001), and "American Wedding" (2003). She also had a guest
Doomed (Buffy the Vampire Slayer) Doomed (Buffy the Vampire Slayer) "Doomed" is the 11th episode of season 4 of the television show "Buffy the Vampire Slayer". Buffy and Riley finally talk. As much as Riley wants to tell Buffy who he really is, he can't, but Buffy is able to guess based on the evidence of the past several weeks. Riley is amazed by her talents and abilities, but when she confesses that she's the Slayer, he doesn't know what that is. An earthquake hits and although it is mild, the memory of the last earthquake in Sunnydale disturbs Buffy. As Xander cleans up some