
A top 5-rated entertainment network, ION’s lineup includes a catalog of proven procedural series and original programming. Anchored by a collection of television’s most-watched dramas, ION’s schedule caters to its loyal binge-watching audience nationwide.
Severide comes back to work, but isn't his usual self; Mills discovers more information about his father's family; Herrmann asks Molly investors to share ideas that could help turn the business around.
The members of Firehouse 51 and the Austin firehouse clash when trucks collide on the way to a call; Boden comes up with a plan to get Dawson her badge; Mills faces his past and future; the Molly's group hits a speed bump starting the food truck.
Dawson tries to find balance with Lt. Casey; Mills deals with a future without the squad; Severide faces his demons; the Molly's crew meets with a city inspector.
Casey deals with the fallout from his sister's divorce; Dawson and Mills settle into their new roles at the station; Brett can't decide what she wants to do; the Molly's crew struggles to get the food truck started.
Casey helps his sister and faces down his corrupt brother-in-law; Brett goes out of her way to assist a mother in need; Mills learns about unlicensed private investigation; Dawson starts training with Herrmann.
Severide wants further investigation when a homeowner saved from a fire is found clutching a suspicious box; Molly's II needs a chef.
The members of the firehouse spring into action when a helicopter explodes over a densely populated area, scattering debris; a dangerous man corners Brett.
Dawson and Casey's relationship is tested as the team responds to a truck leaking hydrochloric acid in a busy intersection; Severide learns about Brittany's past; Mouch has dating troubles.