List of Blake's 7 Episodes - Episodes - Series C

Star One has been destroyed, the Federation is in shambles, and the Liberator is severely damaged. The crew abandon ship as Zen has cut life-support and initiated self-repairs. Avon escapes with Orac and crash-lands on the planet Sarran. There, he is quickly attacked by the barbarian-like natives, but is soon saved by a woman named Dayna Mellanby. The two also find the equally stranded Servalan, and Dayna takes them to meet her father Hal and sister Lauren (an adopted native). Servalan takes the opportunity to flirtatiously sway Avon into working to rebuild the Federation where they could rule together, but Avon rejects her proposal. Avon eventually makes contact with Zen and learns that everyone from the ship is missing. Servalan kills Hal and makes off with Orac who is the only one who can operate the teleporter once Liberator returns. Avon hunts her down and gets Orac back and leaves her stranded alone. Once back on Liberator, Avon and Dayna meet a Federation Captain who claims the ship as his own.

Aboard Liberator, Dayna and Avon are captured by Federation soldiers led by Captain Del Tarrant. They have been unable to control Liberator, since Zen will not recognise their commands and remains on a search and recovery mission of the former crew. Avon tries to hide his identity so that he won't be forced to turn over control of Zen. After a struggle the two are imprisoned in a cabin. Avon breaks the lock and a guard is found dead outside. Avon learns from Zen that the other Liberator crew are accounted for, but at different locations and Zen is trying to get to them. A second guard is found murdered and Tarrant reveals to Avon that he is the killer. Tarrant is actually a wanted resistance agent posing as a Federation officer. He then helps Avon take back the Liberator. Elsewhere, Vila is injured and stranded on the planet Chenga where local natives help nurse his wounds until a group of hunters called "Hitechs" capture him and take him back to their base. Cally, aboard a Chengan rescue ship, is taken there as well along with Servalan, who brokers a deal with the Chengans to let her go. Vila and Cally are unknowingly taken for organ harvesting, but are teleported aboard Liberator before they are killed.

Avon and Tarrant seek out a base of operations on the volcanic planet Obsidian. Dayna and Tarrant teleport down to contact the pacifist inhabitants. However their leader Hower says none would be willing to help. His son betrays their pacifist ideals by contacting a remnant Federation battle group commanded by none other than Servalan herself. Servalan devises an elaborate plan to capture the Liberator in orbit above the planet with a sneak attack. Meanwhile, Federation soldiers teleport aboard with bracelets stolen from Tarrant and Dayna. They try to take over the ship, but Avon secretly orders Zen to attack the battle group as they close in for capture. The battle group retreats and the soldiers flee back to the planet but steal Orac and kidnap Cally in the process. Meanwhile, Tarrant tries to convince the pacifists to help them or else face slavery under Federation control, but Hower is confident that their threat to self-destruct their own world with a nuclear device will prevent any invasion attempt. Tarrant and Dayna rescue Cally and Orac and return to the Liberator. Servalan's battle fleet has regrouped and attacks Obsidian, but Hower detonates the nuclear device and destroys the planet.

Curious about an anomalous black hole that lacks x-ray emissions, Orac takes control of the Liberator and sends the ship into it. Certain they will be killed, the crew tries to stop Orac until the Liberator suddenly stops in a dark void. There, Cally's mind is contacted by a mythical being named Thaarn. Vila goes outside to investigate and finds the ship has landed among a graveyard of other spaceships. He is soon attacked by a machine designed to extract the Herculanium alloy of which much of Liberator's hull is comprised. The rest of the crew head out discovering they are in fact on an artificial planet called Krandor and they are soon taken prisoner by a man called the Caliph and set to work as slaves. Meanwhile, Cally is taken before the mysterious Thaarn who wishes to share rule of the universe with her. Orac is left alone aboard the Liberator and is able to prevent its destruction, while Cally deceives Thaarn and damages the energy control device that was disabling their technology. Avon and Tarrant convince a man named Groff to reverse the gravity field holding Liberator in place, allowing its escape and ultimately destroying Krandor. However Thaarn also escapes in a spacecraft.

Servalan once again tries to ambush and take the Liberator, but Tarrant predicts her tactics and manages to outwit her battle plan. Speaking out against Servalan's incompetence is Jarvik, a subordinate construction worker who believes that as a man he has better intuition for hunting down another man like Tarrant, who was a former crew mate in the Space Command. Intrigued by the concept, Servalan allows him try. Meanwhile, Tarrant decides to raid a Federation freighter carrying valuable Kairopan crystal, but he heads right into Jarvik's trap and the Liberator is captured. The crew of the Liberator are left marooned on Kairos, a planet where nobody survives after the short crystal harvest season. Most impressed, Servalan offers Jarvik command of the Liberator, but he says he has no interest. Servalan instead offers that he rule the Federation with her, providing he can prove himself worthy against Tarrant man-to-man. He must go to Kairos and retrieve the teleport bracelets of the crewmembers. On Kairos, Avon soon finds an ancient and barely functional space module that offers the only chance at escape. Jarvik arrives, fights Tarrant for the bracelets, and returns to the Liberator victorious. However, Tarrant launches the space capsule and, using a deception mechanism devised by Avon, convinces Zen and Servalan that they have a superior craft and demands their surrender. Jarvik urges that they ignore the computers, but he is killed and Servalan leaves by teleport, allowing the Liberator to be regained uncontested.

Arriving at the planet Kezarn, Tarrant sends Vila down to meet a contact who would supply them with crystals needed for Liberator's weapons, but once down he is instead captured by a notorious outlaw named "Bayban the Butcher" and his accomplice Kerril. Vila is then taken to the ruins of an ancient city where Bayban forces him to open an impenetrable door to an area that a local native named Norl says "contains this world and the next", but which Bayban believes leads to a vast treasure. Realising they've been set up, the other Liberator crew teleport down to find Vila. Meanwhile, Vila gets the door open and he and Kerill step through, only to be sent to a room on an ancient spaceship via an advanced matter transporter. Eventually they discover the ship had landed on an Eden-like world and the transport machine was built so the inhabitants of Kezarn could one day colonise it. Norl later tells Vila that he fulfilled the prophecy that an "intuitive" man would help lead the way for his people. Vila declines to leave with Kerril for the new planet and narrowly escapes being killed by an enraged Bayban, who destroys the city in a brutish attempt to break down the door.

Servalan unleashes a deadly plague upon Cally's home world of Auron in another elaborate scheme to lure the Liberator for capture. Cally receives a psychic distress call from her twin sister, Zelda and the rest of the Liberator crew rush to help stop the deadly disease. At the same time, Servalan wants to use the Aurons' cloning technology to create clones in her likeness. In a side plot, two of Servalan's officers, Deral and Ginka, the later having been passed over for promotion by the other, compete for Servalan's favor. Ginka then uses the current situation with the Auronar to eliminate his rival.

On Earth, Avon allows himself to be captured and imprisoned for five days — all in an elaborate scheme to get close to the vicious Federation interrogator named Shrinker whom he believes killed his former lover Anna Grant. When the others come to rescue him, Avon abducts Shrinker who reveals that another agent, Bartholomew, who under Servalan's orders, infiltrated Avon's criminal network, and may be Anna's real killer. The only lead Avon gets regarding the identity of Bartholomew is that only "Chesku" and Servalan would know of his identity. Meanwhile, Servalan's new presidential palace is infiltrated by resistance forces led by Sula, Chesku's wife, who betrays and kills him. Avon tracks down Servalan and finds her imprisoned by the resistance forces. Sula turns out to be Anna, still alive, and Avon concludes that the only way she could have escaped is if she herself was Bartholomew. Anna attempts to kill Avon but is killed by him instead. Avon escapes as the Federation forces arrive to rescue Servalan.

The Liberator comes across a derelict alien ship and Avon, Vila and Cally teleport over to investigate. They find the ship has only one deck and contains a corpse and a strange artefact. After Cally accidentally triggers a self-destruct, all three hurry back to the Liberator and bring the artefact with them. The device then unleashes a ghostly presence that stalks the ship. It takes over Cally's mind sending her into unconsciousness, then shutsdown both Zen and Orac and drains the ship's power systems. All the while the rest of the crew experience strange poltergeist-like happenings and finally confront the spirit, who assumes Cally's likeness. They then look for a means to destroy the entity before it enslaves them all.

The Liberator comes across a mysterious artificial planet that Cally is drawn to, and the rest of the crew chase after her; except for Vila who stays behind with Orac. The others find the world to be one massive computer system ran by a group of aliens called the Ultra who wipe the minds of trespassers and turns them into slave "menials," or processes them for food. Cally and Avon are captured and the Ultra who, impressed with the knowledge the two offer, download their minds into storage cells that Tarrant and Dayna try and get back. Meanwhile, the Ultra force the Liberator to land in a hangar and tap into the computer system. Vila is then encouraged by Orac to recite numerous tongue-twisters and nonsense sayings, all the while, Orac feeds the monologues into the Ultraworld computer — a massive brain at the centre of the complex. The riddles overload the brain's logic systems and shuts it down, thus allowing the others to make their escape.

The crew of the Liberator has followed Servalan's ship to the edge of known space where it suddenly disappears from view. The crew discover it has slipped behind an invisibility screen that hides a planet called Sardos whose inhabitants have advanced matter replication technology. Tarrant and Vila manage to sneak down to the planet by teleporting aboard an incoming freighter piloted by a drunken crew of fugitives. Meanwhile, Servalan has arrived under the invitation of Section Leader Grose, who plans to replicate Servalan's cruiser into a fleet of warships. This would be good news for Servalan, however she quickly learns Grose has shifted loyalties and now serves a mysterious intelligence called "Moloch" which has its own plans for the control and rebuilding of the Federation.

The planets Teal and Vandor are locked in an endless war whose battles are decided periodically by representatives from both worlds fighting to the death in one-on-one combat. Their battleground is a computer-simulated environment on a neutral planet, which is vidcast throughout the galaxy as a popular form of entertainment called Death-Watch. On the Liberator, Vila convinces the others to tune in and watch the latest combat where Tarrant discovers that one of the fighters is his estranged brother Deeta — a skilled gunman who is fighting on behalf of Teal. When Avon learns that Servalan has been selected as the neutral arbiter, he suspects foul play and Tarrant tries to warn Deeta. Tarrant arrives late however, as Deeta has already began the match with his opponent Vinni who manages to gun him down. Tarrant investigates how Deeta could have been defeated so easily, and Orac determines that Vinni is not a human, but a sophisticated android — however to prove it, Tarrant decides to face Vinni in a revenge match over Deeta's death.

Without explanation, Avon follows a series of secret messages to the artificial planet Terminal – an experiment abandoned 400 year ago to study the accelerated evolution of life on Earth. While en route, the Liberator passes through a strange cloud of fluidic particles that, unbeknown to the crew, begin to eat through the hull. Arriving at Terminal, Avon, who refuses to divulge what is going on, teleports down alone. Tarrant and Cally quickly follow to see what he is up to. Avon soon comes upon an underground base where he is captured by guards, but he later escapes and finds Blake in a medical recovery room on life support. In orbit, Vila and Dayna deal with the Liberator as the ship begins to fall apart. On the planet, Avon eventually discovers Servalan is behind the messages in an elaborate ruse to get her hands on the Liberator. She agrees to hand over Blake for the Liberator, but doesn't know the ship is doomed. Likewise, Avon is unaware that the Blake he met was only an illusion. Once Servalan's treachery is revealed, it is too late and she finally obtains the Liberator. However, before she can leave orbit, the ship begins to break up. As Servalan tries to escape by using the teleport system, the Liberator explodes.