Olinsky’s daughter remains in critical condition following a massive fire – leaving Intelligence on edge, but more determined than ever to track down the suspect. Voight opens up the case, knowing that he has Stone and his team’s full support in the investigation, and all of Firehouse 51 behind him to examine potential origins of the fire. (Deathtrap (1) aired on Chicago Fire, S5E15. Fake (3) aired on Chicago Justice, S1E01.)