Visible crew/equipment: When Nebrox is relaxing in a chair on Scorpio's flight deck, large bright yellow power cables are visible running from the console behind him and across the set floor to the right of the shot. Maybe they were jump starting the space ship?
Other mistake: The number of buttons on the left shoulder of Tarrant's costume keeps changing throughout this episode. Most of the time, all 4 are there, but in several intermittent shots, one of the buttons is missing.
It's not every day you can shoot your wife in front of millions of witnesses and get away with it. Klyn, the woman behind the console who sounds the alarm before Avon shoots her, was played by Paul Darrow's real-life wife, Janet Lees Price.