The Alphans encounter a miles-long ark from the planet Daria, where the inhabitants have a very distinctive class separation.
Did You Know?
Barbara Bain had put up quite a squawk as soon as she saw Joan Collins' wardrobe for the episode, demanding that her skirt be longer, so as not to appear sexier than herself. Gerry Anderson refused the "request", explaining that Joan's legs were one of the reasons she was hired for the episode. As a result, Barbara spent the last half of the show dressed in barbarian garb that was shorter than Miss Collins'. Hence, the nickname "Barbara Pain" Gerry Anderson's crew had come up with for the remainder of the series (not to her face, of course). See more
Prof. Victor Bergman
Twenty miles long by five miles wide.
Cmdr. John Koenig
One hundred square miles of space ship.