Topic - The Secret Service

The Secret Service is a British children's espionage television series, made as a Century 21 production for ITC Entertainment and broadcast in 1969. Created by Gerry and Sylvia Anderson, with David Lane and Reg Hill as producers, it succeeded earlier Century 21 productions such as Thunderbirds and, in a manner similar to its predecessors, presented characters as marionette puppets in a filming technique dubbed "Supermarionation". The eighth and final Supermarionation series, The Secret Service incorporated footage of live actors for distance shots at the behest of Anderson, who wished to compensate for the inadequacies of the Supermarionation format (such as the difficulties of inducing effective movement in the puppet characters) and increase its realism. The Secret Service remained Anderson's last puppet series until the 1980s, when he produced Terrahawks using the "Supermacromation" technique. - Source: Wikipedia