With the exception of the 'Chicago' franchise crossover episode, "Infection: Part III", this episode is the only episode of Season 5 to not have a five-word title. Typically, each episode of the series would have the same number of words in the title as the number of the season it was a part of. But for an unknown reason, "In the Valley of the Shadows" has an extra sixth word for a Season 5 episode title.