Network: ITV (United Kingdom)
Premiered: 16.September.1970
Status: Ended

Around 1970, the British and American governments receive incontrovertible evidence that aliens exist and are abducting humans. In cooperation with the United Nations, they set up a secret worldwide organization, SHADO (Supreme Headquarters Alien Defence Organisation), which operates in the 1980s. With resources and equipment under the seas, in the air, on land, in orbit and on the Moon, SHADO's purpose is to stop the alien incursions and find out why the aliens want humans.

Gen. James Henderson - Grant Taylor
Col. Alec Freeman - George Sewell
Cmdr. Ed Straker - Ed Bishop
Col. Paul Foster - Michael Billington
Lt. Gay Ellis copy - Gabrielle Drake
Capt. Peter Carlin - Peter Gordeno
Nina Barry - Dolores Mantez
Dr. Doug Jackson - Vladek Sheybal
Lt. Mark Bradley - Harry Baird
Col. Virginia Lake - Wanda Ventham
Joan Harrington - Antonia Ellis