Chicago Fire: Season Four

All 23 episodes from the fourth season of the adrenalin-fuelled US drama following the lives of the firefighters and paramedics of Chicago Firehouse 51.

Overseen by Battalion Chief Wallace Boden (Eamonn Walker), the team includes Lieutenant Matthew Casey (Jesse Spencer), Kelly Severide (Taylor Kinney), Gabriela Dawson (Monica Raymund) and Christopher Herrmann (David Eigenberg).

In this season, Firehouse 51 is investigated by Internal Affairs and the crew head to the scene of a building collapse where dozens of lives are on the line.

The episodes are: 'Let It Burn', 'A Taste of Panama City', 'I Walk Away', 'Your Day Is Coming', 'Regarding This Wedding', '2112', 'Sharp Elbows', 'When Tortoises Fly', 'Short and Fat', 'The Beating Heart', 'The Path of Destruction', 'Not Everyone Makes It', 'The Sky Is Falling', 'All Hard Parts', 'Bad for the Soul', 'Two Ts', 'What Happened to Courtney', 'On the Warpath', 'I Will Be Walking', 'The Last One for Mom', 'Kind of a Crazy Idea', 'Where the Collapse Started' and 'Superhero'.