Release Message:  When the TARDIS lands, the Doctor (William Hartnell), Ian, and Barbara team up with Vicki to discover what Koquillion is hiding.

Description:  On the planet Dido, the monstrous Koquillion terrorizes Bennett and Vicki, the only survivors of a crashed spaceship. When the TARDIS lands, the Doctor, Ian, and Barbara team up with Vicki to discover what Koquillion is hiding.