I always tried to convince my children when we watched this series that The Thunderbirds were "real people" and not puppets. The efforts that were put in to this series and the movies must have been enormous to have so much detail in order to look realistic, especially in the early to mid 1960's. For it to be in color with such technical animation was astounding. Where did they come up with all of the fully functional props and equipment (Toys That Work)? Their rockets, their functional computers, seemingly functional radios and all other of their functional scenes. My compliments to this well made series.
Review of Thunderbirds
