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.
The Doctor
Sarah Jane Smith
Brigadier Lethbridge-Stewart
Mike Yates
Sergeant Benton
Sir Charles Grover
Professor Whittaker
Butler
General Finch
Mark
Ruth
Adam
Lieutenant Shears
Sgt. Duffy
Corporal Norton
Private Ogden
R/T Soldier
UNIT Corporal
Private Bryson
Robinson
Lodge
Looter
Phillips
Peasant
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Sound
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Theme Song Performance