Landing on the planet of Androzani Minor, the Doctor and new companion Peri go out of the TARDIS to wander around a very, very exotic alien planet and quickly (more or less in this order) find themselves under attack from random people, contract a nasty rash, get captured, jailed, and then shot. Luckily, as it turns out, the Doctor and Peri that were shot were actually android duplicates rather than the real thing. The real Doctor and Peri, on the other hand, now find themselves "guests" of the mysterious Sharaz Jek, who hangs out in the lower caverns wearing a black-and-white jumpsuit and a Phantom of the Opera-style mask.