Doctor Who - Terror of the Zygons, Tom Baker, VHS Video 1988

In this thrilling adventure the Doctor (Tom Baker) finds himself defending Earth from invasion by shape-changing aliens!
Arriving in Scotland at the request of his old friend the Brigadier, the Doctor discovers that the mysterious force which has destroyed three oil rigs has left giant teeth marks on the wreckage. The mystery deepens as the trail leads to the shores of Loch Ness...
Part-cyborg, part-organic creature the Monster of legend exists! It is the murderous tool of the Zygons; alien creatures intent on taking possession of the planet.
The Doctor and his companions must find a way to defeat the Zygons and their deadly Loch Ness Monster but the Zygons have terrifying powers to assume human shape and the Doctor finds that his friends and allies are not always what they seem...

in good clean condition see photos