While Dr. Albert is talking to Wilma, he picks up a 1978 Alladin "18 Wheeler" lunchbox.
The shuttle that is seen leaving the Trebor's palace is the same type of shuttle used in Battlestar Galactica (1978).
The Katari city-scape is a combination of matte paintings and photographs of architect Kisho Kurokawa's "Takara Beautilion" Pavilion at Expo '70 in Osaka, Japan. One of the most iconic buildings at the fair, its modular design is rooted in the "Metabolist" architecture movement which Kurokawa co-founded.
The weapon Darius hands Buck just before his duel with the Trebor is eerily reminiscent of the Covenant Plasma Rifle in the Halo series of games. In fact, the Trebor refers to the weapon as a "laser rifle".
In the episode, Buck fights the Trebor. "Trebor" is "Robert" spelled backwards. The episode was written by Robert W. Gilmer. Not at all coincidental is the episode directed by Bob Bender, with "Bob" often short for "Robert".