The BAU team searches for a serial killer along the Appalachian Trail in rural Virginia.
Kensi and Deeks search for three Marines who go missing after an ambush; Nate returns from his mysterious assignment.
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.
Kate confronts her past. Randall's brush with viral fame leads to an unexpected discovery. Kevin debates the best path for his future.
H.R.G. hosts an unconventional Thanksgiving dinner; the Petrelli family receives a surprise guest; Lydia searches for the truth.