In the year 2020 Earth is under threat from Martian androids who want revenge on the human race. They consist of Zelda, her son Youngstar and her sister called Sister. An organisation is set up on Earth called , which is top secret to the rest of the world. This is led by Dr Tiger Ninestein with other characters such as Sergeant Major Zero.

Starring:

Anne Ridler, Windsor Davies

Genre:

Family, Sci-Fi