Warning: spoilers ahead for the winter premiere of The Irrational Season 1, called "Scorched Earth."
The Irrational finally returned with a new episode for the first time since back in early November, and "Scorched Earth" wasted no time in forcing Alec to face his extremely understandable fear about fire. Brought onto a case after his former doctor recruited him to come speak with young burn victim Izzy, he realized that this was a case of arson rather than accidental burning, and brought Marisa into the fold. By the end of the hour, Alec opened up his trauma from the explosion all those years ago, and why it has given him a "superpower" of sorts.
