Justin Hartley's wife, Sofia Pernas, is coming back to his hit show Tracker - just in time to see him shirtless. CBS released the first look at the third season's return on Sunday, March 1, when Billie (Pernas) arrives to help Colter (Hartley) on a case. There is probably a plot-related reason why Hartley's character has to strip down in front of Billie, but who needs an excuse to see the main character shirtless? Not Us.