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
Restless (Buffy the Vampire Slayer) Restless (Buffy the Vampire Slayer) "Restless" is the 22nd episode and season finale of season four of the supernatural drama television series "Buffy the Vampire Slayer" (1997–2003), and the 78th episode of the series overall. The episode was written and directed by the show's creator Joss Whedon and originally aired on The WB in the United States on May 23, 2000. The premise of "Buffy the Vampire Slayer" is that an adolescent girl, Buffy Summers, is chosen by mystical forces and given superhuman powers to kill vampires, demons, and other evil creatures in the fictional town of Sunnydale. She is