Earl often sighs as he walks across a room. This allowed the person inside the costume a chance to see where he was going. He could only see through the open mouth.
Most of the characters' names are of petroleum corporations (Sinclair, Hess, BP, Phillips).
The news anchor seen in several episodes is named "Howard Handupme". This is a reference to the fact that he is a hand puppet.
Jim Henson got the idea of a live-action show featuring animatronic dinosaurs because he was impressed by the technology his Creature Shop was developing for Las Tortugas Ninja (1990). The same technology was used to create the Dinosaurs. Many of the Ninja Turtle suit actors worked as various Dinosaur suit actors for the series.
Seven episodes that did not air in primetime aired when the show went into syndication.