A Nuisance Call

Lieutenant Severide is anxious to implicate the serial arsonist, while Dawson and Shay get a shock on a routine call. Meanwhile, suspicions continue to point to Clarke as the mole inside the firehouse and Molly's falls deeper into the red. Elsewhere, Mouch campaigns for union president, with the aid of Isabella, and Boden butts heads with Gail McLeod.

Larisa Polonsky

Zoya

Michelle Forbes

Gail McLeod

John Hoogenakker

Lt. Spellman

Mena Suvari

Isabella

Vedette Lim

Devon

William Smillie

Hadley

Jeff Hephner

Jeff Clarke

Jesse Lee Soffer

Jay Halstead

Jon Seda

Antonio Dawson

Treat Williams

Benny Severide

Randy Flagler

Harold Capp