Severide, still hiding a shoulder injury and his reliance on painkillers to keep working, desperately tries to stall the drug test to avoid discovery.

Lieutenant Casey delivers a baby on the scene of a massive 10-car highway pileup , providing a rare moment of joy amidst the holiday chaos.

Struggles to hide painkiller use during a mandatory drug test. Monica Raymund Saves a bleeding man and later celebrates Casey's delivery. Joe Cruz Joe Minoso

The episode includes a humorous yet dangerous subplot involving a garage fire caused by a deep-fried turkey, a common Thanksgiving mishap. "Chicago Fire" Two Families (TV Episode 2012)