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Mark Llewellyn (I)

Mark Llewellyn is known for his work on Without a Trace (2002), Grand Theft Auto IV (2008) and Numb3rs (2005). See full bio »

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Known For

Without a Trace
Without a Trace Miscellaneous Crew
Grand Theft Auto IV
Grand Theft Auto IV The Crowd of Liberty City
Numb3rs Writer
The Mentalist
The Mentalist Homicide Detective


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 (5 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)
 2008 Grand Theft Auto IV (Video Game)
The Crowd of Liberty City (voice, as Mark Anthony Llewellyn)
 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 Anthony Llewellyn | Mark Llewelyn

Did You Know?


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

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