Refueling at an EMCO gas station, Phil accidentally leaves Carol there. Hours later, Phil notices Carol's disappearance and heads back to Oklahoma to find her. Believing she is at a Speedy Pump, he drives to every Speedy Pump in Oklahoma and fails to find her. He soon believes she has returned to Tucson, but heads there to find it deserted.
While in Tucson, Phil successfully sends a message to Carol by train, where she receives it and drives to Tucson to reunite with him in "The Boo".