A professional theater actor, Morrison has been on the professional stage since the early 1980s and has won awards such as the Los Angeles Drama Critics Circle Award for Outstanding Performance. He has also directed theater productions.

His most recent role is that of Counter Terrorist Unit Director Bill Buchanan on 24. He began as a guest star mid-way through the fourth season (2005), and was a main cast member in the fifth and sixth seasons (2006 and 2007). He is also returning in the seventh season (2008)

On television, Morrison has guest starred in series such as Frasier, The X-Files, JAG, The West Wing and Six Feet Under.

Morrison frequently works with producers Glen Morgan and James Wong, and was a main cast member of their 1995 series Space: Above and Beyond. Another project in which he worked alongside James Wong was in the movie The One where Morrison played the role of hero Jet Li's best friend.

(wikipedia.org)