The character of Phoebe Green was originally intended to be a recurring role because Chris Carter admired actress Amanda Pays and he liked working Sherlock Holmes references into the script. But the fan reaction to this rival to Scully proved so strong that this idea was swiftly dropped.
The arsonist's target, Lord Malcolm Marsden, is named for the show's hair stylist.
David Duchovny suffered the only injury on-set, burning his hand, which left a small permanent scar.
Amanda Pays previously worked with Mark Sheppard's father William Morgan Sheppard in Max Headroom (1985) and Max Headroom (1987).
Mark Sheppard and Lynda Boyd would later both guest star on Supernatural.