Following a run on the ABC soap opera One Life to Live, Slater made his Broadway debut as the lisping Winthrop Paroo opposite Dick Van Dyke in the 1980 revival of The Music Man. Additional Broadway credits include Copperfield, Merlin, Macbeth, Side Man, and The Glass Menagerie. In addition he has performed in London's West End in One Flew Over the Cuckoo's Nest and Swimming With Sharks. Slater made his big screen debut in 1985's film The Legend of Billie Jean, and had significant roles in the 1986 mystery film The Name of the Rose, the 1989 dark comedy Heathers and Skateboarding flick Gleaming The Cube, and the 1990 teen film Pump Up the Volume. His most notable roles from the '90s include the role of outlaws "Arkansas" Dave Rudabaugh in 1990's Young Guns II and Clarence Worley in 1993's True Romance. He also voiced the character John Watson a.k.a. "Wonko the Sane" in BBC Radio 4's production of The Hitchhiker's Guide to the Galaxy). Christian Slater has signed on to join The Forgotten, ABC's new crime drama from producer Jerry Bruckheimer. The show premiered on Tuesday, September 22 (leading out of the Dancing with the Stars results show). The Forgotten revolves around the Forgotten Network, a team of amateur sleuths who work on cases involving unidentified victims.