MID-SEASON PREMIERE

Cruz’s past comes back to haunt him when Chicago Fire returns from holiday hiatus on Jan. 8 on NBC.

The episode, titled “A Favor” also sees Severide preparing to teach an arson class at the academy.

Meanwhile, Mouch searches for a victim’s next of kin.

“A Favor” airs Wednesday, January 8 (9-10 p.m. ET) on NBC.

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CHICAGO FIRE -- "A Favor" Episode 13009 -- Pictured: (l-r) Jocelyn Hudon as Lyla Novak, Hanako Greensmith as Violet Mikami -- (Photo by: Peter Gordon/NBC)