Original air dates, 1 January 1977 through 22 January 1977. New good BluRay release.
Leela is introduced, being cast out for blasphemy and won’t shut up when it would be useful. Her father stands in for her on some sort of test. Father dies, Leela is outcast.
TARDIS arrives. Doctor has a look-about.
Leela being hunted by archers or crossbowmen. She shoots first. Tomas shoots the second. She leaves him there, warning him of the deviousness of the tribe.
Doctor and Leela avoid some invisible monsters.
Back at the Tribe, Tomas tries for justice for Leela, gets nowhere. A voice tells the priest to kill the two who’ve come back in acroass the boundary.
The primitives are either using space junk or have survived a crash of a spaceship and worshipping something as their god. They want to free something from Paradise, behind a wall. They think the Doctor is the Evil One and plan to kill him. I doubt Leela will let that happen. They flee. Leela takes The Doctor to a place where his face is carved in the mountainside as The Evil One. Credits roll, oops.
Doctor fusses with the Artifacts, and gets his own recorded voice from one of them. Must look at the wall. Finds a time barrier.
Men attack time barrier, die.
Leela and Doctor come back to village. Doctor proves himself mortal, not the Evil One.
Doctor talks to the radio thing, who says he’s going to destroy them all and shuts off the perimiter, letting monsters in.
Doctor and Leela go to track down signal source, by climbing into the statue of the Doctor’s mouth.
Invisible monsters attack tribesmen; one with a modern weapon fights back. Credits roll.
Doctor remembers what was going on. Leela wants to kill the Tesh, Doctor talks her through the hidden door and off they go.
The Techs aboard the ship are going to kill Leela for being a savage and the Doctor for helping her. Doctor calls back to village and gets priest to lead the villagers to the mouth of the statue.
Doctor and Leela break into ship and follow voices to the computer. Data core contains a memory transplant of the Doctor, and its own self, the two going mad.
While the Doctor argues this with the computer, the Tesh hunt Leela, who’s weapon runs out.
Systems fail as the computer demands “Who am I?” Leela goes to rescue the Doctor.
Computer goes nuts, sends mental command “destroy and be free” and sets atomic reactors to explode. Doctor has 24 minutes to strip his mind from the computer.
Everyone is destroying to be free.
The priest shoots the computer as the Doctor removes himself from its memory core.
The tech and savages can’t agree on a leader, much less anything. The Doctor leaves them to it, Leela going with him, against his will.