Matt Gerald is an American actor and screenwriter.Gerald was born in Miami, Florida, USA. A graduate of The University of Pennsylvania, Gerald is best known for his role as Corporal Lyle Wainfleet in James Cameron's sci-fi thriller Avatar as well as his terrifying arc on Showtime's Dexter as elusive predator, Ray Speltzer.Gerald's recent film credits include Escape Plan with Sylvester Stallone and Arnold Schwarzenegger, G.I. Joe: Retaliation with Dwayne Johnson and Bruce Willis, Red Dawn with Chris Hemsworth and Josh Hutcherson, Freelancers with Robert De Niro and Forest Whitaker, The Frozen Ground with Nicolas Cage and John Cusack, and Solace with Colin Farrell and Sir Anthony Hopkins, due out in 2014.Other film credits include Faster, Terminator 3: Rise of the Machines, XXX: State of the Union, S.W.A.T., Tigerland, Elektra Luxx, In the Mix, The Minus Man, and Magnolia.Gerald's television credits include recurring roles on The Shield as the inimitable Detective Tommy Hisk, The Unit as Delta team leader Beau Dauber, and Life as the wise-cracking Officer Krebbs.Other guest-star credits include Intelligence, Castle, Grimm, Last Resort, CSI: Miami, NCIS: Los Angeles, Criminal Minds: Suspect Behavior, Lie To Me, Saving Grace, Without A Trace, and CSI: Crime Scene Investigation.