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Mark Llewellyn (I)

Mark Llewellyn is known for his work on Without a Trace (2002), Numb3rs (2005) and The Mentalist (2008). See full bio »
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Known For


Hide Hide Show Show Miscellaneous Crew (1 credit)
  Without a Trace (TV Series) (technical advisor - 146 episodes, 2002 - 2009) (technicial advisor - 1 episode, 2005) (FBI technical advisor - 1 episode, 2002)
- True (2009) ... (technical advisor)
- Devotion (2009) ... (technical advisor)
- Labyrinths (2009) ... (technical advisor)
- Hard Landing (2009) ... (technical advisor)
- Heartbeats (2009) ... (technical advisor)
Hide Hide Show Show Actor (4 credits)
 2009 F2: Forensic Factor (TV Series)
 2009 Urban Legends (TV Series)
- Welcome Home? (2009) ... David
 2008 The Mentalist (TV Series)
Homicide Detective
- Pilot (2008) ... Homicide Detective (as Mark Llewelyn)
 2005-2006 Without a Trace (TV Series)
FBI Tech / SWAT Agent / FBI Agent
- Win Today (2006) ... FBI Tech (uncredited)
- Freefall (2005) ... SWAT Agent (uncredited)
Hide Hide Show Show Writer (1 credit)
 2006-2009 Numb3rs (TV Series) (story - 3 episodes)
- Friendly Fire (2009) ... (story)
- End of Watch (2007) ... (story)
- Guns and Roses (2006) ... (story)

Personal Details

Alternate Names:

Mark Llewelyn

Did You Know?


Worked for the FBI from 1976, later becoming an advisor on TV series.

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