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The challenge coin that Morgan gave to Angel as well as all the coins on Morgan's desk belongs to Jim Clemente.
When the team arrives at the unsub's house and Reid steps out of the car, Matthew Gray Gubler is wearing unmatched socks, which is the actor's trademark.
The opening scene of this episode almost exactly mirrors the kidnap scene in the movie Taken, including some of the dialog, the girl hiding under the bed with a cell, a bad guy entering the room and her scream.
In keeping with the "8" theme, the signal Spencer sends is given the encryption code H8-88. "H" is also the 8th letter of the alphabet.
The number 8 appears to be significant in this episode: In the final showdown, the mirror in which the unsub sees himself is an octagon (8-sided), the chandelier behind Rossi has 8 arms, all the windows in the house have 8 panes of glass, and the couch has 4 seats making 8 cushions on it.
Dina Meyer ("Regina Lampert") and Shemar Moore co-starred together previously on the TV show Birds of Prey. Dina played Barbara Gordon/Oracle and Shemar played Jesse Reese.
Dina Meyer ("Regina Lampert") once dated Billy Joel, the American musician and pianist whose first hit in 1973 was titled "Piano Man," the name given to the serial killer in this episode.
The character names "Regina Lampert," "Hamilton Bartholomew," "Peter Joshua" and "Herman Scobee" were also characters in the film Charade (1963) starring Cary Grant and Audrey Hepburn.
After The Inheritance and Dharma & Greg, this was the third time guest star Brigid Brannagh and series star Thomas Gibson had worked together.
When Garcia identifies Travis James, the DOB on his arrest report is 10/28/98, which would make him 13 at the time, rather than 22.
The tornado in this episode was referred to as an F-2, which is an obsolete classification and was discontinued in 2007. The correct classification should have been EF-2 from the Enhanced Fujita Scale that is currently being used to describe tornadoes.
The book about Baby Star that was being read to Henry by JJ in the final scene was especially created for this episode because no other classic children's books could be cleared due to copyright issues. Virgil Williams wrote the verses himself while thinking of his own children.
The text on Garcia's monitor read: "Oaklahoma Department of Juvenile Corrections."
The prop knife that was used in the final scene with Chase and his victim Evan was obviously made of rubber.
The title of this episode ("From Childhood's Hour") was derived from a poem by Edgar Allan Poe of the same name.
The unsub in this episode suffered from "asymbolia." Also called pain disassociation, this condition is manifested by pain that is perceived, but does not cause suffering, and often results from injury to the brain.
Reid stated he was an MIT graduate; however, when it has already been established in Season 4 ("Memoriam") that he chose CalTech over MIT.
Hotch and Rossi stated they were part of the FBI team 10 years previously after the shooting at the school; however, Rossi was retired from the FBI at that time. In Season 3, Strauss mentions it had been 10 years since Rossi was at the FBI.
In real life, College Boards may release past AP exams, but never the exam taker's name.
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high stake situations, Thrillers, long running show, Murder & Mayhem, Detectives