|The Unrivaled Standard|
|Season 6, Episode 21|
|Air date||May 3, 2018|
|Written by||Jeff Drayer|
|Directed by||Joe Chappelle|
The Strongest Among Us
One for the Ages
The Strongest Among Us is the twenty-first episode of the sixth season and the 135th overall episode of Chicago Fire.
Lt. Severide is shocked when Renee Royce resurfaces at the firehouse. Casey comes up with a plan to help Chief Boden in his latest pursuit. Kidd regrets a decision she made regarding Severide. Herrmann doesn't see eye-to-eye with Lt. Colannino over coaching their son's basketball team.
In the fire at the tire shop, Lt. Colannino rescues the injured tire worker from harm and is injured after the building that is in fire explodes. Herrman tries to save him, but is held back by Chief Boden. The fire is extinguished with water by firefighters, who find Colannino, but are unable to save him. Colannino dies in the line of duty, surrounded by Casey and the other firefighters.
- Jesse Spencer as Captain Matthew Casey
- Taylor Kinney as Lieutenant Kelly Severide
- Monica Raymund as Paramedic Gabriela Dawson
- Kara Killmer as Paramedic Sylvie Brett
- David Eigenberg as Firefighter Christopher Herrmann
- Yuri Sardarov as Firefighter Brian "Otis" Zvonecek
- Joe Minoso as Firefighter Joe Cruz
- Christian Stolte as Firefighter Randy "Mouch" McHolland
- Miranda Rae Mayo as Firefighter Stella Kidd
- Eamonn Walker as Battalion Chief Wallace Boden
- Sarah Shahi as Renee Royce
- Andy John Kalkounos as Engine Lieutenant Colannino