Nikolas Mikhail Stavrosovich Cassadine is a fictional character on the long-running ABC soap opera General Hospital. The role was originated by Tyler Christopher, who played the character from 1996-1999, and then after a four-year hiatus resumed the role in 2003 and is the current actor. Stephen Martines (under the stage name "Coltin Scott") played the role from 1999 to 2003, and Chris Beetem temporarily took over the character in December 2005.