Cruz's (Joe Minoso) younger brother Leon (Jeff Lima) just couldn't stay away from Chicago Fire. He is set to return to the NBC drama in an episode airing on Feb. 13, and his reemergence spells trouble for his firefighter sibling.
While there aren't many details surrounding Leon's return, we do know that he'll be back for a pivotal arc that leads to a crossover with Chicago P.D. Last seen in Season 6, he was believed to be getting his life together in Florida. However, the upcoming crossover suggests he may have fallen...