Justin Hartley's wife Sofia Pernas is coming back for season 3 of Tracker - but what does it mean for Colter's love life? During an exclusive interview with Us Weekly, executive producer Elwood Reid confirmed Pernas' return, saying, "She'll be back. We have a really good, spicy midseason finale and Billie is coming back in the winter premiere." Pernas, 36, reprising her role as Billie doesn't mean Colter will finally settle down. "It's tricky because he's never in one place for very long. These are conversations that I have with Justin all the time.