Stella leaves for Earth wearing a black outfit. She doesn't have anything with her. Moments later she is seen on Earth wearing her purple outfit.
Buck, Twiki and Stella escape the planet in a star fighter. None of them is carrying the blastium yet they have it use on the trip home.
Everyone is concerned that the frozen oxygen will ignite, but oxygen is not in itself flammable, it can only contribute to the combustion of another, flammable, material.
Hydrochloric acid is used in an enormous open vat to refine the blastium. The fumes from the acid would be strong enough to cause harm to everyone in the room yet no one is wearing any protective clothing.
Cumbersome Twiki is seen getting assistance by Buck (Gil Gerard) to go down some stairs. By himself, Twiki couldn't possibly have gained access to a Starfighter.
About 3/4 through the episode, Buck is trying to help Twiki escape when he is disabled in a corridor by a sonic emitter, which causes him to drop the weapon he was carrying. Instead of simply picking up the weapon and using it to disable the emitter, Twiki asks Buck to lift him up high enough to disable the emitter himself. They then leave the weapon behind.
When the miner is propelled across Belzack's office, the harness lifting him is visible.
Dr. Huer mispronounces replenish as "replentish".