1. Sacramento County, California - K-9 Deputy Shaun Hampton - Traffic Stop
2. Pierce County, Washington - Deputy Marty Zurfluh - Domestic Violence Call
3. Cook County, Illinois - Officer Robert Almeida - Juvenile Disturbance Call

In the last show of this series Jeremy Clarkson races the new Jaguar XJ against something even bigger and more powerful - the rotation of the Earth itself.
Meanwhile, Richard Hammond achieves a boyhood dream by testing two 1980s supercar icons, the Porsche 959 and Ferrari F40, and James May is in America to drive NASA's very latest Space Exploration Vehicle.

George is surprised after he discovers that his dad has passed away, and he ends up getting another surprise when he meets the ghost of George Senior.

Three of the expeditionaries missing outside the settlement for several days and as hope of locating them dwindles one of them, Josie Hunter, arrives back at the settlement. Josie is pleased to be back with her family and Forthaven celebrates her sudden return. Her children though can not communicate with her and reports of her attack on a fellow XP outside the perimeter begins to circulate.