This William Hartnell-era episode of DOCTOR WHO finds the Doctor and his fellow travelers on-board the Tardis landing on an alien planet. They quickly discover that the friendly inhabitants of the planet, the Menoptra, are slowly being destroyed by a malevolent presence known as the Zarbis. The Zarbis are capturing the planet in a giant web, thereby killing off the Menoptra and creating a powerful force that won't allow the Doctor and his allies to leave. Together with the Menoptra the Doctor must figure out how to defeat the Zarbis before it's too late.
Description by Warner Home Video:
Doctor Who: Ep. 13 - Web Planet, The
"Somewhere, somehow we are being slowly dragged down!" When Doctor and his friends stray from their astral plane and the Tardis materializes in eerie alien surroundings, a mysterious force prevents them from leaving. Is it a natural phenomenon or some malevolent intelligence' Uncanny occurrences are followed by encounters with the deadly Zarbis and their unknown leader, to whom the travellers fall prey. With their allies, the Menoptra, the travellers must discover how to immobilize the Zarbis, save the Menoptra from massacre and rid the planet of this powerful and horrifying evil. As a growing web begins to envelop the planet, imprisoning the travellers in its mesh, the Doctor must consult all of his wisdom to escape its hypnotic power. But what is at the center of the web and from where does it draw its power'