Life was blissful for Hayley and Mateo until tragedy entered their lives once more in the form of Jim Thompson. Jim, a surviving passenger on the airplane flight that took Maria Santos Grey's, created a phony relationship with Brooke English in hopes of hiding the fact that he was responsible for the plane's destruction. Brooke, suspicion of Jim's actions, asked Hayley and Mateo to do some sleuthing into Jim's past. Hayley and Mateo discovered some of Jim's shady secrets, putting their lives in jeopardy. Jim learned of Hayley and Mateo's investigation and rigged the furnace of their apartment building to expel carbon monoxide gas into their apartment. Hayley and Mateo survived, but Mateo remained in a coma for weeks.