
James G. MacDonald is an American actor and director known for his extensive work in film, television, and theater spanning over 35 years. He notably portrayed Captain James Wainwright in the Star Trek: Deep Space Nine episode "Little Green Men." MacDonald has appeared alongside many high-profile actors and worked with acclaimed directors across diverse genres including comedy, drama, thriller, horror, and science fiction. His versatile roles range from a naive young captain in Star Trek to parts in films like Volcano and Tigerland. He has also received awards for his work in theater and filmmaking. Beyond acting, MacDonald writes and directs, and he is active in teaching writing and acting workshops to incarcerated and formerly incarcerated individuals. His career is marked by both character-driven performances and creative contributions behind the scenes.
Ballard
2025
The Winchesters
2022
All Rise
2019
The Rookie
2018
Sweet/Vicious
2016
Little Boy
2015
Crisis
2014
Montana Amazon
2013
Chicago Fire
2012
Major Crimes
2012
Longmire
2012
Scandal
2012
Fissure
2011
Love Bites
2011
Castle
2009
Lie to Me
2009
The Mentalist
2008
In Plain Sight
2008
The Unit
2006
Criminal Minds
2005
Weeds
2005
NCIS
2003
Peacemakers
2003
Phone Booth
2003
Hostage
2002
Without a Trace
2002
CSI: Miami
2002
24
2001
Joy Ride
2001
The Division
2001
Tigerland
2000
Space Cowboys
2000
Fantasy Island
1998
Sex and the City
1998
Sour Grapes
1998
Mercury Rising
1998
Brooklyn South
1997
Volcano
1997
Turbulence
1997
The Fan
1996
Blackout
1996
The Birdcage
1996
Pacific Blue
1996
Broken Arrow
1996
Jake and The Kid
1995
JAG
1995
ER
1994
Malcolm X
1992
NYPD Mounted
1991
Two Evil Eyes
1990
































































