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Donald Sage Mackay
Acting
Filmography
House
2004 · as Neil
Malcolm in the Middle
2000 · as Man
Modern Family
2009 · as George
NCIS
2003 · as Kerry Killmartin
Elementary
2012 · as Ben
Tom Clancy's Jack Ryan
2018 · as CJCS Jeff Maguire
Red, White & Royal Blue
2023 · as Jeffrey Richards
Mad Men
2007 · as Dr. Gosman
Blue Bloods
2010 · as Lt. Mike Collier
Weeds
2005 · as TSA Agent Warren
Nuremberg
2025 · as Senator William Fulbright
ER
1994 · as Detective Lash
Frasier
1993 · as Eduardo
The Good Wife
2009 · as Mike Pedrano
The West Wing
1999 · as Ellis
Masters of Sex
2013 · as Prosecutor John Watson
According to Jim
2001 · as Greg
JAG
1995 · as Pilot
Alex Rider
2020 · as General Lomis
Eric
2024 · as Jerry
Treadstone
2019 · as Greg Sanders
The Swan Princess: The Mystery of the Enchanted Kingdom
1998 · as Jean-Bob (voice)
7th Heaven
1996 · as Host
The Great Escaper
2023 · as Nathan
The Regime
2024 · as Richard Kaiser
The Practice
1997 · as Howard McGowan
Scrubs
2001 · as Doctor
What I Like About You
2002 · as Super
Play the Game
2009 · as Retirement Home Director
Going Dutch
2025 · as General Gus King
Wreck
2022 · as Henry Allan
Providence
1999 · as Officer Duncan
The District
2000 · as Reporter #1
The Good Mother
2013 · as Bob
Cell 8
2022 · as Pedersen
The Following Events Are Based on a Pack of Lies
2023 · as Norm Niedecker
Mystery Island: House Rules
2025 · as De. Stanley Wellington
Animal Friends
2027 · as John Fitzgerald
The Amazing Mrs. Novak
The Amazing Mrs. Novak
2009
A Colt Is My Passport
A Colt Is My Passport
— · as Wilson
