Alchemy
The BAU travel to Rapid City after two male victims are discovered murdered in a ritualistic manner. Also, Reid continues to grieve over Maeve’s death.

Cast
Joe MantegnaDavid Rossi
Paget BrewsterEmily Prentiss
Adam RodriguezLuke Alvez
Kirsten VangsnessPenelope Garcia
A.J. CookJennifer Jareau
Aisha TylerDr. Tara Lewis
Zach GilfordElias Voit
Ryan-James HatanakaTyler GreenCriminal Minds on tvt

