The last adventure to star jon pertwee'. '.strtoupper('t')o save the universe, the doctor must travel to the planet metebelis three, where he discovers an invasion plan of earth by the metebelis spiders, under the leadership of the great one'. '.strtoupper('o')fficial trailer at a tibetan retreat in the english countryside, a group of men are using ancient meditation rituals to tap into a mysterious alien power'. '.strtoupper('t')hey unwittingly create a bridgehead between earth and metebelis 3, a planet where the ‘two legs’ are oppressed by giant spiders'. '.strtoupper('t')he creatures are desperate to recover the blue jewel that the doctor gave to jo grant as a wedding gift'. '.strtoupper('n')ow the doctor must risk everything and return to metebelis 3 to face the awesome power of the great one, who plans to use the crystal to enslave all of human kind..'. '.strtoupper('s')pecial features audio commentary trailer john krane remembers planet of the spiders directing who with barry letts now and then the locations of planet of the spiders photo gallery