The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51. Boden and Severide are asked to make peace with an old foe for the greater good. Brett receives family news. Foster plans a party with friends.
After a father and daughter get kidnapped, a former foe of the BAU returns with very specific demands for Reid that give a whole new meaning to the phrase “wheels up.”
Peter will need to concentrate on his developing relationships in Santiago, the vibrant capital of Chile. His first date raises serious concerns when she reveals she has never been in love before. Can she convince Peter that she is ready to settle down and get married? Another woman is getting a second one-on-one date causing a furor with one devastated bachelorette who hasn't even had one yet.
Ivar and Igor may be plotting against Oleg, but they’re still part of the force that will depart Kiev to invade Scandinavia. King Harald and King Bjorn begin preparations for the invasion.