
Actor · 29 credits
Donald Sinclair Davis (August 4, 1942 – June 29, 2008) was an American actor, artist, and former military officer. He began his career as a theater professor before transitioning to acting. He became known for his role as General George Hammond in Stargate SG-1 (1997–2007) and Major Garland Briggs in Twin Peaks (1990–1991). Davis appeared in numerous films, including A League of Their Own (1992), The Fan (1996), The 6th Day (2000), and Far Cry (2008). He often portrayed authority figures and military characters, reinforced by his real-life experience as a U.S. Army captain. In addition to acting, he was a talented painter and sculptor. He studied theater and art at Southwest Missouri State College and later earned a Ph.D. in Theater Arts from Southern Illinois University. Davis was married to Ruby Fleming-Davis and remained an influential presence in film and television until his passing.

Supernatural
2005
Trotter

Stargate Atlantis
2004
Major General George Hammond

The Twilight Zone
2002
Dr. Tate

The Dead Zone
2002
Senator Harlan Ellis

Andromeda
2000
Avineri

The West Wing
1999
Don Butler

Honey, I Shrunk the Kids: The TV Show
1997
Mr. Washington

Poltergeist: The Legacy
1996
Harold Taggart

The Sentinel
1996
Wilton Fisker

The Outer Limits
1995
General Callahan

Viper
1994
Lloyd

The X-Files
1993
Captain William Scully

Highlander: The Series
1992
Palance

Heritage Minutes
1991
Norris

Northern Exposure
1990
Lloyd Hillegas

Twin Peaks
1990
Garland Briggs

Booker
1989
Judge

Screen One
1989
Bill Stevens

Bordertown
1989
Josiah Richmond

Wiseguy
1987
Dr. Morris

21 Jump Street
1987
Principal Harris

L.A. Law
1986
Judge Richard Bartke

MacGyver
1985
Wyatt Porter

Knots Landing
1979
Warden Vernon Howard

Columbo
1971
Bertie Sopkowitz