D Neil Mark was who had a successful Hollywood career. Mark additionally landed roles in the TV movies "I Still Dream of Jeannie" (1991-92), "The Substitute" (USA, 1993-94) and "Deadlocked: Escape From Zone 14" (Fox, 1994-95). Mark worked in television in Mark's early acting career as well, including parts on "The X-Files" (Fox, 1993-2002) and "Strange Luck" (Fox, 1995-96). Several more television roles followed in the nineties and the early 2000s, including stints on "Stargate SG-1" (1997-2006) and "Three" (WB, 1997-98). Mark's work around this time also included a part on the TV movie "Storm Chasers: Revenge of the Twister" (Family Channel Studios, 1997-98). Mark also appeared in the action film "The 6th Day" (2000) with Arnold Schwarzenegger. during these years In Mark's more recent career, Mark tackled roles on "UC: Undercover" (2001-02), "Smallville" (2001-2011) and "John Doe" (Fox, 2002-03). Mark also appeared in "Connie and Carla" (2004). Most recently, Mark acted in the Zac Efron dramatic adaptation "Charlie St. Cloud" (2010).