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.
Holmes and Watson investigate after a BASE jumper is shot out of the sky and has his parachute sabotaged by two separate people; Joan's sister thinks she sees Shinwell with a member of his old gang.
Jane and Frankie work hard to solve the murder of someone who grew up with them; Jane and Maura must decide when to reveal the truth about Lydia's pregnancy to Angela.