EXCLUSIVE: Mekhi Phifer is set to star opposite John Barrowman and Eve Myles in the upcoming fourth season of sci-fi drama Torchwood, which Starz is co-producing with the BBC for a run on both networks. Phifer joins original Torchwood stars Barrowman, who plays time agent/con man Captain Jack Harkness, and Myles, who plays ex-police officer Gwen Cooper. The Lie to Me alum will play the third lead, Rex Matheson, a CIA agent, a fast-tracked high-flyer with a lethal sense of humor who starts to feel his mortality when his life is put in danger. In addition to his co-starring turn on Fox’s Lie to Me last season, Phifer, repped by WME and Brookside, was a regular on NBC’s ER. He also recently signed on for the Lifetime action film Close Quarters. Torchwood recently cast Crash actress Arlene Tur in a recurring role.