Doctor Who: Invasion of the Dinosaurs backdrop

Doctor Who: Invasion of the Dinosaurs

Directed by Paddy Russell

Starring Jon Pertwee, Elisabeth Sladen

The Third Doctor and Sarah arrive in 1970s London to find it has been evacuated because dinosaurs have appeared mysteriously. It turns out the dinosaurs are being brought to London via a time machine to further a plan to revert London to a pre-technological level.