Criminal Minds

The character David Zimmerman (portrayed by Zack Weinstein) was named by Virgil Williams as a shout-out to fellow writer on the show, Bruce Zimmerman.

The case presented in this episode was loosely based on Henry Lee Lucas, who was convicted of murder in 11 different cases and was once listed as America's most prolific serial killer. Lucas died in prison on March 13, 2001 from heart failure at the age of 64.

Cindi introduces her son, Anthony, to Morgan as his Uncle Derek. However, if Cindi is Morgan's cousin, then Anthony would be Morgan's second cousin (or cousin once removed) and not his uncle.

During this episode, Laura Heathridge's left arm is missing and she wears a prosthetic limb. At the end of the episode, she opens the door to a mystery man using a real left hand (not seemingly part of her delusion), then also reaches to the man using a real left hand. It could be argued that her real left hand is part of her delusion, but if this is the case then she should have had a real arm from the moment the doorbell rang (presumably also part of her delusion).

The challenge coin that Morgan gave to Angel as well as all the coins on Morgan's desk belongs to Jim Clemente.

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.

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.