Revealing mistake: While Avon is occupied in hand-to-hand combat with a native on the beach, someone who isn't supposed to be in the shot can be seen walking on the ridge in the background, waving his arms in the air. (00:13:35)
Revealing mistake: Liberator's auto-repair circuits have mysteriously stopped functioning. The molding on the top center flight deck console is hanging loose, a glitch that remains for several episodes. (00:23:50)
Revealing mistake: When Liberator moves into view on Servalan's screen and stops, a bad special effects matte causes the stars behind the ship to keep on sliding to the right. (00:21:35)
Sarcophagus - S3-E9
Revealing mistake: When Tarrant, trying to call Dayna, falls against the flight deck console, the whole thing tilts visibly. (00:38:45)
Sarcophagus - S3-E9
Revealing mistake: Peter Tuddenham was the talented voice behind most of the Blake's 7 computers - Zen, Orac & Slave in particular. In "Sarcophagus," Zen is under attack from the telepathic alien mind brought aboard, and its voice changes pitch, rate and timbre as it struggles to ward off the attack. During many of these moments Zen sounds exactly like Orac or Slave, since normally those computers' voices are Peter with the same type of pitch/rate tricks anyway.
Revealing mistake: To conceal their unauthorized entry into the secret lab, Cally very carefully closes and locks the sliding door. But when she turns back to speak with Tarrant, the "secured" door rolls halfway back open by itself. No, it's not Servalan's troops sneaking in to catch them: there's no sign of anyone there. Besides, anyone unlocking the supposedly-locked door would have alerted them. A case of malfunctioning BBC scenery, plain and simple. (00:43:45)
