Factual error: Tarrant fails Astronomy 101 here, just as Travis did in the first season. He tells the clerk, "I'm surprised you've heard of it (the FSA), if you're from another galaxy." The Tharn and his minions were not extragalactic; they were from other planets in our galaxy.

Continuity: As the ship falls into the black hole, Cally loses consciousness with her right hand beneath her head. A few shots later, her position reverses and she's lying with her left hand under her head.

Continuity: When Jarvik and Dayna teleport up at the end, her bracelet disappears as they materialize in the teleport bay, but is back when they reach the flight deck a few seconds later.

Factual error: Tarrant is some pilot. He miraculously gets the LEM into orbit without any rocket boosters or propulsion system of any kind - and with its landing gear still attached.

Continuity: The probe Vila uses to collapse the door's forcefield vanishes when the forcefield actually collapses.

Visible crew/equipment: When Bayban is introducing himself to Vila, an equipment shadow moves across the back of his studded leather jacket.

Continuity: Dayna's outfit is skin-tight and she's not carrying any sort of backpack. So just where was she hiding that rather large robotic bomb she sends down the hall to blow up Bayban's goons? (The pack on her belt isn't a storage pouch - it's the Liberator handgun's power unit. Note that Avon, Tarrant and Cally wear identical packs, with the guns plugged into them. And it isn't large enough to hold the mobile bomb anyway, not even disassembled.)

Revealing: 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.

Other: As the Auron pilot's ship is being brought aboard, a bad scratch on the special effects film briefly creates a large black gash on the hull of Servalan's whale-shaped spaceship.

Visible crew/equipment: When Avon and Tarrant are consulting Orac about cloning, an equipment shadow crosses Avon's chest.

Revealing: When Tarrant, trying to call Dayna, falls against the flight deck console, the whole thing tilts visibly.

Revealing: 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.

Continuity: The little plastic dome Tarrant places on the alien artifact, connecting it to Orac, disappears when the object begins to disintegrate.

Factual error: The Ultra may be expert collectors of knowledge, but they have their facts wrong about Avon, who tried to steal 5 million credits from the Federation banking system. The Ultra think it was 500 million.

Plot hole: When Ultraworld first shows up on the Liberator's screens, all scans show it isn't there. Avon explains it can't be detected because it is an artificial planet using alien technology which blocks all electromagnetic radiation from escaping. But the crew are looking at it on their screen - the ordinary visible light we use to see things is part of the electromagnetic spectrum too.

Continuity: In his scuffle with Servalan's trooper, Vila's teleport bracelet falls off and rolls away. We're even shown a close-up of it as it comes to rest near the dropped gun. Yet in the very next shot, as the fight continues, the bracelet is back on Vila's wrist.

Revealing: 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.

Visible crew/equipment: As Servalan begins explaining her nefarious plan to the captured Avon, an equipment shadow slides across the blue diamond-shaped pane just behind her.

Continuity: Tarrant's hair seems to have grown at least an inch overnight. It's longer and bushier than it was in "Terminal," which supposedly took place the day before.

Continuity: The damaged Orac has long loose wires hanging out when Dorian carries it off the ship, but they disappear in the next shot, when he enters the base.