This was the show that sparked my interest in Sci-Fi way back in 1962, being only five the opening shot of Steve and Venus flying past the fin of the huge spaceship Fireball XL5 filled me with wonder!
Although this was a series for it's time it was one of the first to depict a space fleet of patrol ships monitoring our quadrant of space, notably used in Star Trek a few years later. The characters from the very first episode were amazingly fleshed out by Gerry and Sylvia Anderson, only to be further developed by the talents of the other scriptwriters resulting in a fine continuity right up the last episode, unheard of in those days. Stories involved time travel, space pirates and of course earth domination, which had the puppets smoking, shaving, being tied up and the odd reference to child psychology! -Very adult for a child's T.V. series.
My favourite episodes - A day in the life of a space general, Space Magnet & 1875 In all, superb sixties Sci Fi fun.