At age 13, Christian Slater was on Broadway portraying a youthful version of this Arthurian wizard
Merlin was a musical based on a concept by 
popular illusionist Doug Henning and Barbara De ... Merlin opened on Broadway 
at the Mark Hellinger Theatre on February 13, 1983 and closed on ... an evil 
sorceress and, in supporting roles, newcomer Nathan Lane and a young 
Christian Slater.