This reminded me very much of the Peter Cushing film "Dr. Who and the Daleks" (1965) as the TARDIS deposits the eponymous, but presently comatose, Time Lord (Jon Pertwee) and his assistant "Jo" (Katy Manning) onto the jungle planet of "Spirodon". Fortunately, he manages to recover and together they explore the foliage - complete with some menacing plants that spit a toxic gunge at anyone passing by - and meet up with the crew of a wrecked spaceship who are aware that the natives of this world have the ability to stay invisible. That's the least of their troubles though when they discover that t...