The designs for the castle and grounds are loosely based on the style of the early Playstation game Spyro the Dragon, which Tim Ferrier thought John Crichton would probably have played.
Where did the television come from? In a line cut during editing, the Ogre moans about the Princess, "Only this morning she made me throw out a perfectly good television set!"
The scenes in the car park were filmed at the same Olympic Stadium location as the meeting between Crichton and Gary Ragel (alias D'Argo) in "Won't Get Fooled Again."
Ben Browder's initial concept had Crichton and Chiana meeting Zhaan in an enchanted forest. However, that sort of location filming wasn't feasible on the episode's budget.
Big Zhaan is partly based on the original concepts for the Delvian Priestess, in which "Zenn" would have been a big blue, Buddha-sized man.
Virginia Hey returned from America specifically to shoot her scenes as the real Zhaan, and took that opportunity to record her documentary footage for "Unrealized Reality."
Rowan Woods shot his appearance as Big Zhaan while directing "I Shrink Therefore I am." He finished directing early one day so that he could be on set at 4am for his acting role.
Dave Elsey and the Jim Henson's Creature Shop crew wanted to give Lani Tupu three-foot long horns for his Ogre costume - something like one of Terry Gilliam's creations in Time Bandits. However, the practicalities of having a swordfight meant they had to be smaller.
The Ogre's horns are in fact borrowed from the Goat who was sacrificed by the Priests on Arnnesk in "What Was Lost."
Listen carefully to the scene when Stark is reciting the sonnet - every single clue that Crichton and Chiana need is contained in it. There's no cheating in the episode!
Tammy MacIntosh was midway through filming episodes of the Australian medical drama All Saints when she returned for her cameo as Gretel. She decided that she wasn't going to think too much about having baked beans for intestines!
The elevator traveling sideways and the reference to "Arthur Frelling Dent" are Ben Browder's tribute to the hit BBC radio and TV series The Hitch-hiker's Guide to the Galaxy and its star Mark Wing Davey, who was head of Browder's drama school.
The look of the talking head on the TV is borrowed from the series Max Headroom.