Doctor Who: Planet Of The Spiders
 

At a Tibetan retreat in the English countryside, a group of men are using ancient meditation rituals to tap into a mysterious alien power. They unwittingly create a bridgehead between Earth and Metebelis 3, a planet where the 'Two Legs' are oppressed by giant spiders. The creatures are desperate to recover the blue jewel that the Doctor gave to Jo Grant as a wedding gift.

Now 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...

doctor who scans
 

thanks for all the great doctor who scans, you've filled a bunch of gaps. don't suppose you can help out with any of my still missing ones:

Myths and Legends (The Time Monster, Underworld & The Horns of Nimon)
Kamelion Tales (The King's Demons / Planet of Fire)
Revenge of the Cybermen / Silver Nemesis
Time and the Rani

cheers