I remember all of his work and Twizzle, Torchy and Four Feather Falls were some of the first programes I watched before the sci fi element appeared and I was always a big fan of all his work. I even bought TV 21st Century comic every week. Wish I still had them as they're collectors items now.
We must have been made of much tougher stuff as kids in those days though as anyone who sees clips of Torchy find the characters to be rather scary and grotesque. Can't say I ever noticed in those days though. I couldn't see any programe maker supporting and idea where a lonely old man makes his own little boy these days.
Twizzle (I still have the book) and Torchy were oft-repeated in the early to mid sixties before the Supermarionation series took off. Torchy was even repeated in the 1970's.
Some of the themes that Gerry Anderson incorporated into his more famous series were well ahead of their time, even though all of the series (except Joe 90 set in 2012) are still even now set in the future - he touched on deforestation, genetic modifications, exploitation of resources, misuse of nuclear power whilst the Americans were still having wet dreams about Commies in all their Sci-Fi programmes.