Trivia: The Promellian battle cruiser is actually the alien spacecraft from the 1986 horror parody 'Night of the Creeps'. Originally it had been designed with all the detailing on the bottom since it was only filmed from below. The production staff simply turned the model upside down and presto, instant Star Trek ship.
Trivia: In this episode, the stripe on Picard's door is light purple. Usually, the info stripes are brown with white lettering. Also, you see that Picard's quarters are on Deck 9, and has a view of space, whereas Kirk's cabin was further inside, with no windows. This was a means of protecting him from attack.
Trivia: Due to a noisy aqueduct on the set, they had to go back and overdub virtually all of the dialogue in the pumping station scenes on the planet's surface. This is most apparent with the character of colony leader Gosheven, who was portrayed by guest actor Grainger Hines. After filming was completed, a schedule conflict prevented Hines from participating in the overdubbing sessions, so another actor rather mechanically voiced Gosheven's lines. The incongruous overdub was so obvious and so unflattering to Grainger Hines that he requested his name be dropped from the episode credits, and so it was.