Criminal Minds Wiki

"Magnum Opus" is the thirteenth episode of Season Eight and the 175th overall of Criminal Minds.


While Reid copes with a loss in his personal life, the rest of the BAU travels to San Francisco to investigate a serial killer active in the Mission District.

Guest Cast[]

  • Jeff Adler - Man
  • John Patrick Amedori - Bryan Hughes
  • Alex Beach - Sherry Douglas
  • Zach Book - Paul
  • Ashleigh Borman - Aimee Fortner
  • John R. Colley - Alan Archer
  • Anna George - Doctor Barbara Moore
  • Kate Hamilton - Kelly Miller
  • Jamie Luner - Madison Riley
  • Amy M. Morgan - Elaine Porter
  • Brian Mulligan - Andre
  • Melinda Stephan - Woman
  • Craig Watkinson - Detective Lennon Miles
  • Malachi Weir - Tre

Referenced Criminals[]


  • "Sugars of Someday" by American Head Charge
  • "Just In Time" by Tony Bennett

Bookend Quotes[]

  • Jennifer Jareau: "My blood alone remains: take it, but do not make me suffer long." — Marie Antoinette
  • Spencer Reid: "Sometimes the hardest part isn't letting go but rather learning to start over." — Nicole Sobon


  • In Latin, magnum opus means "great work", referring to the largest, and perhaps the best, greatest, most popular, or most renowned achievement of a writer, artist, composer or craftsman.
  • This is the first episode written by crew member and current script coordinator Jason Bernero.
  • It is said that the killer's blood type must be AB+ to universally accept blood plasma, but this is actually untrue. AB+ is the universal acceptor for blood cells, but transfusion of blood plasma works in reverse. AB+ is the universal donor, and O- is the universal acceptor.
  • One of the victims was found “by a cable car stop in the Mission district”. There are no cable cars in the Mission District.

Criminal Minds Episodes