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."
When Chase first approaches Evan and knocks on the window, Evan takes off the earplug from his right ear. When the scene changes, Evan removes the earplug from his right ear again.
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.
The license plate on the car of one of Luke Dolan's neighbors (WLT-62X3) was the same one used for Gideon's car in the final scene of "In Name and Blood."
When JJ and Morgan are staking out Doyle, Reid calls JJ's cell phone. The back light on her iPhone is actually locked rather than shown as an active call screen.
During the closed-door Senate hearing, Senator Cramer says to SSA David Rossi, "..., but I'm not the one on trial, Agent."
An U.S. Senate hearing is not a trial, as it is a hearing. A better phrasing might have been, "I'm not the one under investigation (or review)."
The drug used by the unsub, as originally written, was changed to "trilamite" because the network didn't want to advertise the actual drug used to treat seasickness, which is extremely dangerous.
The tool that they had trouble identifying because it left parallel cuts is called pattern shears. It is a type of scissors used to cut paper or velum patterns for stained glass. One side has two parallel blades that the other side presses the paper into as it cuts. This ensures that the pattern pieces are slightly smaller than drawn so there will be space between the glass pieces to fit lead came or copper foil and solder when pieced together. The width between the parallel blades is slightly different depending on the technique being used. (Lead came is thicker so needs more space than copper foil.) His was broken in half and he used the double bladed side, thus the parallel cuts.
high stake situations, Thrillers, long running show, Murder & Mayhem, Detectives