The BAU fly to Colorado when the locals receive a blast from the past and find a rotting skull inside a time capsule buried 25 years ago.
Sam is transported back into his own body in Elk Ridge, Indiana, at the age of 16, and realises that he has the opportunity to save the lives of his brother and father.
Luke flirts with love and disaster when he falls for a woman driver (Roz Kelly) entered in the annual Hazzard Obstacle Derby.
Mary and Rhoda decide to become more involved socially when they both panic about being 30 and single.
Mary decides to be absolutely honest when she learns that her income tax return is about to be audited.