When victims are found dead in Philadelphia in a similar style to victims of The Replicator, the stalker who has been tracking the BAU's every move, the team thinks this could be the break they need to try and apprehend him.
- Meredith Adams - Molly Patton
- Brian Appel - Agent Grant Anderson
- Jayne Atkinson - FBI Section Chief Director Erin Strauss
- Matthew Del Negro - Detective David Rizzo
- Michelle Gardner - Doctor Balboa
- Derek Graf - Ruffian
- Scott Grimes - Donnie Bidwell
- Bo Kane - Sergeant Blutarsky
- Jessie Lande - Shannon Lavin
- Billy Mayo - Captain Marcus Jackson
- "Just in Time" by Tony Bennett
- David Rossi: "Imitation is the sincerest form of flattery." — Charles Caleb Colton
- Michelle Gardner, the actress who portrays Doctor Balboa, also played a medical examiner in an episode of the short-lived Criminal Minds spin-off, Suspect Behavior.