Producer of 'Thunderbirds Are Go', Sylvia is the first woman in the world to be in charge of a feature film of this type.
She is also the voice of Lady Penelope.
Thunderbird 2 guards the Zero X until it reaches space and then Alan Tracy in Thunderbird 3 takes over.
Alan makes certain the spaceship is safely on its way and then returns to Earth to find that Scott and Virgil have gone to a night club with Lady Penelope.
The base is now at half strength and Jeff has no course but to stop Alan going out. In a huff the young astronaut goes to bed.
He sleeps fitfully and soon he is involved in a fantastic dream.
Operating from gantries above the sets, the puppeteers work behind the 20-22 inch characters, so they see all the action in reverse.
To counteract this problem, special transistorised TV cameras are attached to the film camera and the scene is featured on a monitor screen raised on a level with the puppeteers' bridge.
The script calls for a dream sequence, and that can only mean one thing for the 'Thunderbirds Are Go' team . . . every man and woman must concentrate on producing the most fantastic sets, effects and illusions ever created for a feature film.
Agile minds turn to everyday materials, such as dry ice to swirl the characters and locations in a vapourising mist. Brilliant artists concoct weird and wonderful designs in paper, wire and string so that Alan's imagination is portrayed with full impact.