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
Surprise (Buffy the Vampire Slayer) the Judge, also played Luke in "Welcome to the Hellmouth". Both episodes were two-parters in which his character died in the second part. "Surprise" was the final episode to air on Monday nights on The WB. Together with "Innocence," the show transitioned from Mondays to Tuesdays as a lead-in for The WB's then newest debuting series "Dawson's Creek". Both "Buffy" and "Dawson's Creek" would go on to become two of the network's signature series. Surprise (Buffy the Vampire Slayer) "Surprise" is episode 13 of season two of the television series "Buffy the Vampire Slayer". It was written by Marti Noxon