Jon Pertwee as The Doctor

Elisabeth Sladen as Sarah Jane Smith

Nicholas Courtney as Brigadier Lethbridge-Stewart

Richard Franklin as Mike Yates

John Levene as Sergeant Benton

Noel Johnson as Sir Charles Grover

Peter Miles as Professor Whittaker

Martin Jarvis as Butler

John Bennett as General Finch

Terence Wilton as Mark

Carmen Silvera as Ruth

Brian Badcoe as Adam

Ben Aris as Lieutenant Shears

Dave Carter as Sgt. Duffy

Martin Taylor as Corporal Norton

George Bryson as Private Ogden

John Caesar as R/T Soldier

Pat Gorman as UNIT Corporal

Colin Bell as Private Bryson

Timothy Craven as Robinson

Trevor Lawrence as Lodge

Terry Walsh as Looter

Gordon Reid as Phillips

James Marcus as Peasant