
D. Neil Mark is a Canadian actor who has appeared in numerous film and television productions. He starred in The 6th Day (2000), Fear (1996), and Fly Away Home (1996). In addition to his film roles, he has appeared in various series, including The X-Files (1993–2018), Stargate SG-1 (1997–2007), and Smallville (2001–2011).

The Italians Are Coming
2025
The Italians Are Coming

Born to Raise Hell
2010
Born to Raise Hell

Charlie St. Cloud
2010
Charlie St. Cloud

The Santa Clause 2
2002
The Santa Clause 2

The 6th Day
2000
The 6th Day

They Nest
2000
They Nest

Turbulence 2: Fear of Flying
1999
Turbulence 2: Fear of Flying

Y2K
1999
Y2K

Storm Chasers: Revenge of the Twister
1998
Storm Chasers: Revenge of the Twister

Contagious
1997
Contagious

Night Visitors
1996
Night Visitors

Dead Ahead
1996
Dead Ahead

Deadlocked: Escape from Zone 14
1995
Deadlocked: Escape from Zone 14

The Substitute
1993
The Substitute

The Lone Gunmen
2001
The Lone Gunmen