Severide and Herrmann clash over office space. Boden looks at Pelham's past as he considers making him permanent. Gallo's resentment of Pelham comes to a head. Brett and Ritter force Violet to confront her true feelings for Gallo.

After Sara, Ava, Behrad and Gary arrive in New York City, they track down Dr. Gwyn Davies, who isn't the scientist they expected. Astra, Spooner, and Gideon are still trying to stop the Legends from using the time machine, but they run into some more setbacks along the way. Meanwhile, in the pocket dimension Nate and Zari work together on the Hoover situation as well how to make their future together work.

Ambrose discovers the source of Percy's ritualistic practices and dives deeper into her past.

Jimmy takes a moment to highlight some Tonight Show sponsors, then catches up with Will Ferrell, Lucy Hale and Beeple before welcoming musical guest Sam Fender.