Heather also made her only movie appearance in the 1980 sci-fi flop Galaxina, starring Dorothy Stratten, Playboy's 1980 Playmate Of The Year that was later murdered by her jealous husband who then committed suicide.
The freeze-ray sound effect is actually the Martian heat-ray effect from War Of The Worlds (1953).
The plot of this episode bears more than a passing resemblance to the Star Trek episode "Wink Of An Eye."
The exploding planet shot in this episode is recycled from episode 5, "Wiki To The Rescue."
In the final scene, watch Craig's face as Sid laughs on in the background - just at fade-out, you can see him starting to smirk.
The console button sound effects featured for the Starfire ship were recycled from Filmation's Star Trek: The Animated Series archives, being the sound of the communicators from that series.
Sid states that since he was almost the same height as Craig, he had to wear six-inch heels to make himself look taller and more menacing, from his original height of 6'3 to 6'9 - Craig was an inch taller than him, at 6'4.
According to Sid Haig, the helmet which Dragos wears was originally sculpted by putting a two-compound mix which turned into foam that later hardened over his face, which was wrapped in Saran Wrap and he also had a paper towel stuffed in his mouth to keep the foam out. After it hardened some, it was cut off his face and sculpted, and parts from model planes, cars, and boats were glued on it to give it the technological look.
The eye-piece also was a practical effect; whenever it was turned on it was supplied with power from a cable plugged in behind him, making it hard for him to move and allowing no shots of him from behind.
Writer Samuel Peeples also wrote the network-accepted pilot of Star Trek "Where No Man Has Gone Before" in which James Doohan also was featured in, as well as the Star Trek: The Animated Series pilot episode "Beyond The Farthest Star," in which Doohan's voice as Scotty was featured.
One of the main musical cues for action scenes in this episode and others and this series is recycled from Star Trek: The Animated Series, also produced by Filmation 5 years before.