With no commissions and funds running low, APF were approached with an offer of collaboration with children's author Roberta Leigh and her colleague Suzanne Warner to produce the puppet TV series The Adventures of Twizzle for Associated-Rediffusion.

With some reluctance, the company took on the commission and the programme was such a success that it immediately led to a further collaboration with Leigh for the first series of Torchy the Battery Boy.

In 1960, APF made a live-action thriller feature film, Crossroads to Crime, for Anglo-Amalgamated, and a series of TV advertisements for a London travel company.

Supercar was made between 1960 and 1961, Fireball XL5 in 1962, Stingray in 1964 – the first British children's TV series to be filmed exclusively in colour – and Thunderbirds between 1964 and 1966.

[12] All Century 21's productions featured an opening ident of a field of pale concentric circles, which form a moving, off-centre tunnel against a blue background, into which flies a yellow dart which penetrates through a gap in the Century 21 logo already situated in front, at which point everything stops moving.

This was accompanied by a typical Barry Gray string glissando and the caption "A Gerry Anderson Century 21 Television/Cinema Production" – the logo being part of that.

At the start of the 1970s, on completion of their contracted tenure stemming from Lew Grade's 1962 buy-out, the Andersons and Reg Hill went on to form another company titled Group Three Productions (named after the three founders), with Gerry as chairman.