The BAU team searches for a serial killer along the Appalachian Trail in rural Virginia.
Coulson and the team discover that the most unexpected person from S.H.I.E.L.D.'s past may hold the key to stopping Earth's destruction.
Nick represents James' nephew Levi after he gets jumped in the school kitchen and refuses to uphold the student honor code by revealing which gang members are liable.
Kate confronts her past; Randall's brush with viral fame leads to an unexpected discovery.
Kensi and Deeks search for three Marines who go missing after an ambush.
