One Chicago & The FBIs Wiki
The Last One for Mom
Season: 4
Episode: 20
Original airdate: April 26, 2016
Teleplay by: Gwen Sigan
Story by: Matt Olmstead
Directed by: Fred Berner
Episode chronology
Previous episode: I Will Be Walking
Next episode: Kind of a Crazy Idea


Detective Holloway continues to entrust Lt. Severide to watch over her young son at the firehouse while she testifies in court as part of an undercover operation. When the situation takes an unexpected turn, Severide is left to deal with the aftermath. The firehouse responds to a blaze at an art gallery that has a victim trapped inside and prompts Cruz to make a rash decision amid the chaos. Casey receives a suspicious package in the mail that casts suspicion on him from the Board of Ethics. Meanwhile, Brett discovers Otis isn't taking care of his own important issues and confronts him, but finds he is stubborn and more interested in rallying the troops to organize a trip to Las Vegas for the annual firefighting conference.


Main Cast

Guest Stars


  • Michael Weber as Al Nelson
  • Jaclyn Hennell as Mary Holloway
  • Erica Bittner as Olivia
  • Rainbow Dickerson as Liz Brexel
  • Anthony Ferraris as Squad 3 Driver Tony Ferraris
  • Timothy W. Hull as Lucas
  • Joseph Fleetfoot Sada as Armand
  • Grier Burke as Kate
  • Violet Hicks as Sally
  • Sophia Hubert as Sally (Prosthetic Double)


Background information and Notes

Chicago Fire season 4
Episodes Let It BurnA Taste of Panama CityI Walk AwayYour Day is ComingRegarding This Wedding2112Sharp ElbowsWhen Tortoises FlyShort and FatThe Beating HeartThe Path of DestructionNot Everyone Makes ItThe Sky is FallingAll Hard PartsBad for the SoulTwo T'sWhat Happened to CourtneyOn the WarpathI Will Be WalkingThe Last One for MomKind of a Crazy IdeaWhere the Collapse StartedSuperhero
Other Seasons Season 1Season 2Season 3Season 5Season 6Season 7Season 8Season 9Season 10Season 11