You and I are scientists, Professor. We buy our privilege to experiment at the cost of total responsibility.
Featuring one of the most vividly-alien planets in the show's history, this story proves how effective a studio-based story can be. Designer Roger Murray-Leach built an detailed jungle set that looks amazing even by today's standards. Featuring the survivors of a crashed expedition, a crew man transformed into something evil and a terrifying anti-matter monster, this remains one of Doctor Who's most atmospheric tales to date. Like many classics of the Hinchcliffe era, this story pays homage to some iconic stories. Sorenson's transformation into an anti-man is pure Jekyll and Hyde. But the biggest homage is to Forbidden Planet as the monster draws the crew, the Doctor and Sarah into the dark pit within the planet. Never has a story title been so apt. As a kid watching this in the 70s, moments in Planet Of Evil must have been absolutely terrifying. Today it is striking and chilling in equal measure.