'Planet of Platonia' by Alan Fennell

Bizann, ruler of the distant world of Platonia, is about to engage in trade talks with Earth for his planet’s supply of platinum. However, Bizann’s aide, Volvo, has joined forces with Bizann’s political rival, Generva, in a plot to plunge the two planets into war. When an attempt on Bizann’s life fails, Steve Zodiac and the rest of the Fireball XL5 crew are sent to escort Bizann to Earth – unaware that Volvo has placed a bomb inside Robert the Robot…

Paul Maxwell (Colonel Steve Zodiac), Sylvia Anderson (Doctor Venus), David Graham (Professor Matt Matic / Lieutenant 90 / Volvo), John Bluthal (Commander Zero / Bizan), Gerry Anderson (Robert the Robot)

Directed by David Elliott
Produced by Gerry Anderson
Associate Producer Reg Hill

TX (UK - ITV):
17th June 1963

Notes:
*Featuring Colonel Steve Zodiac, Venus, Professor Matt Matic, Commander Zero, Lieutenant 90 and Robert the Robot