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.
Jon Pertwee
Elisabeth Sladen
Nicholas Courtney
Richard Franklin
John Levene
Noel Johnson
Peter Miles
Martin Jarvis
John Bennett
Terence Wilton
Carmen Silvera
Brian Badcoe
Ben Aris
Dave Carter
Martin Taylor
George Bryson
John Caesar
Pat Gorman
Colin Bell
Timothy Craven
Trevor Lawrence
Terry Walsh
Gordon Reid
James Marcus