The year is 2020 and a special force has been set up to defend the Earth from the Evil forces of Zelda (an ugly prune-faced android crone and the queen of Guk), who – after destroying the NASA Expedition to Mars – plans to attack Earth.
Zelda is assisted in her nefarious deeds by her useless son, Yung-star and her spiteful twin sister, Cy-star.
The only thing that can stop the invasion is the Terrahawks, operating from their secret South American base, Hawksnest, and headed up by the heroic Dr “Tiger” Ninestein – a chap who has eight clones of himself.
The rest of the team consists of the poetically inclined computer boffin Lt. Hiro who spends most of his time up in space talking to his plants, Lt. Hawkeye (an American gunner with computer-enhanced vision), fighter pilot and former pop star Captain Kate Kestrel and Captain Mary Falconer (Ninestein’s right-hand person).
The Zeroids are basically a bunch of balls that roll around shooting at things when they’re ordered to do so. They are headed up by Sgt. Major Zero (voiced by Windsor Davies, in a virtual voice reprise of his camp performance in It Ain’t Half Hot, Mum).
While the Terrahawks have the Zeroids, Zelda has her own robots (which take on the shape of cubes) and some monster servants such as Yuri, the space bear, and MOID (the Master Of Infinite Disguise) – a skeleton-like alien with non-existent facial features who has the capacity to assume the physical appearance of anyone.
This was familiar Gerry Anderson fodder, though with a new line of ultra-sophisticated stringless puppets with internal electronics – an advance which Anderson (pictured below right on the Terrahawks set) dubbed ‘Supermacromation’.
Captain Mary Falconer
Denise Bryer
Captain Kate Kestrel
Anne Ridler (speaking)
Moya Griffiths (singing) Sergeant Major Zero
Windsor Davies
Lt. Hawkeye
Jeremy Hitchen Dr “Tiger” Ninestein
Jeremy Hitchen
Lt. Hiro
Jeremy Hitchen
Colonel Johnson
Jeremy Hitchen
Zelda
Denise Bryer Cy-star
Anne Ridler Yung-Star
Ben Stevens
