Chris Boucher has since confirmed in interviews that, had the BBC commissioned a fifth season, it would have been a lot like this episode.
As a cost-saving measure, sets used in Assassin (1981) were redressed and used again for this episode.
This is the last episode in which Servalan interacts with any of the Scorpio crew, and the only time she meets Soolin.
The guard blown out of the airlock when Scorpio detaches echoes the fate of Raiker when the Liberator detaches from the London in Space Fall (1978).