Review of the Complete Story:
PLANET OF EVIL sees Tom Baker's Doctor teaming up with the late, great Elisabeth Sladen to beam down to a remote jungle planet where a vicious, invisible alien creature is making mincemeat of the locals. Inevitably the Doctor ends up being blamed for these deaths and is imprisoned, setting up a slightly repetitive, episodic format for the rest of the story.
Okay, so the storyline is heavily indebted to the likes of FORBIDDEN PLANET, but PLANET OF EVIL does have stuff going for it. Sladen is on particularly strong form her as the dungaree-wearing Sarah Jane, always seeming to be involved in the thick of the action. Baker's Doctor experiences a physical adventure and even gets to slug somebody at one point; the bit where he drops into an antimatter void is hilarious. The jungle sets are effective, as is the alien, and there are some memorably grisly corpses on show.
Also making this a slightly superior adventure is Ewen Solon, a Welsh actor with a long history of appearing in cult fare. Solon plays the excellent role of a senior crew member who becomes a valuable ally for the Doctor and Sarah Jane; far more effective than the stock, lunk-headed villains of the piece. PLANET OF EVIL may not be great but it certainly is more than watchable.