Chicago Fire

NBC, 8 p.m.

In “Blow This Up Somehow,” Gallo (Alberto Rosende) makes a split-second decision during a dangerous fire rescue, leaving Casey (Jesse Spencer) steaming that his direct orders were not obeyed. Kidd (Miranda Rae Mayo) feels a strain in her relationship with Severide (Taylor Kinney). Brett (Kara Killmer) and Mackey (Adriyan Rae) find themselves searching for answers following a series of suspicious calls.