- Vaughn Armstrong - Ben Kebler
- Bruce Barton - M.E. Kevin Gaylen
- Tate Birchmore - Young Robert Boles
- Matt Burns - Robert Boles
- Nancy Linehan Charles - Eileen Kebler
- Mike Dazé - Bryan Davis
- Augie Duke - Jill Simmons
- Peter Elbling - Harold McDermott
- Ed Ford, Jr. - Old Man
- Jill Remez - Doctor Laura Braga
- Pamela Shaddock - Sergeant Carol Gridley
- Mia Topalian - Andrea Gambrell
- Alisa Torres - Diane Haller
- Aisha Tyler - Doctor Tara Lewis
- Los Narco-satanicos
- The West Memphis Three (Damien Echols, Jessie Misskelley, Jr., and Jason Baldwin)
- "Sometime Soon" by Steven Davis
- Aaron Hotchner: "The clock tocked loud. I threw it away. It scared me when it tocked." Tillie Olsen
- Aaron Hotchner: "The first condition of immortality is death." Stanislaw Lec
- "Future perfect" is a verb form, which describes an action or event that is expected to be completed in the future. It is formed by combining the future tense (such as "will have" or "shall have") and the perfect.
- Despite being credited in the opening sequence, Matthew Gray Gubler, the actor who portrays Reid, doesn't appear in the episode, just like the previous two episodes.
- This is, in fact, the fifth episode in which a main character has not appeared despite his or her actor or actress being credited as usual. The first episode was Broken Mirror, in which A.J. Cook and Kirsten Vangsness do not appear as JJ and Garcia, respectively, despite being credited. The second was 25 to Life, in which Thomas Gibson does not appear as Hotch.