I’ve cast the runes. I’ve consulted the talisman of Mercury.
If the BBC didn’t pay royalties to Erich von Däniken for “The Daemons” (Story Production Code JJJ), perhaps they should have. The premise of aliens having guided Earth’s history, as put forth in von Däniken’s 1968 book Chariots of the Gods?, forms a central conceit in much of Doctor Who, and that ur-plot essentially starts here, in the Season Eight finale. There are hints of ancient aliens in earlier stories, notably “Doctor Who and the Silurians,” but in “The Daemons,” Guy Leopold (actually producer Barry Letts with Robert Sloman) makes the Chariots connection explicit by linking the alien in question to the Devil.
As the Doctor explains—at the Cloven Hoof Inn in the English town of Devil’s End, just in case anyone missed the point—the Daemons, from the planet Daemos, came to Earth one hundred thousand years ago and helped homo sapiens defeat the Neanderthals as a sort of science experiment, in the process forever imprinting the notion of powerful horned beasts into the collective unconscious. The rituals that evolved around the Daemons came to form religious and magical beliefs, though the Doctor avers that because the Daemons are attracted to psychic energy, these rituals, passed down through generations, merely serve to focus human emotions, neatly squaring the science/magic circle.
The Doctor is not the only one who knows of the power of the Daemons, though. The Master is also in on the secret, and he’s dressed to play the part, posing as both the newly installed local vicar and as the head of the local black magic coven, the better to harness the town’s mental energies to summon the last of the Daemons, Azal. Conveniently, Azal just happens to have parked his spaceship in the nearby Devil’s Hump burial barrow.
The story goes off the rails quickly enough, with several long expository sequences given over to a giant heat barrier surrounding the town once Azal manifests, and as usual, the Master has set into motion a plot more likely to kill himself than anyone else.
For all the Master’s cunning, he really doesn’t think these things through, assuming that the ability to summon an ancient alien from an advanced civilization using a rooster somehow confers power over said creature (the Daemon, not the rooster). But then, the biggest threat to the Doctor comes not from Azal, nor Azal’s pet gargoyle that for some reason does the Master’s bidding, but rather from the Master’s chief henchman, a newspaper-clipping-clad Morris dancer. That’s the kind of story this is…