Twizzle 1957-1958 Torchy the Battery Boy 1960 Four Feather Falls 1960 Crossroads to Crime 1960 Supercar 1961-1962 Fireball XL5 1962-1963 Stingray 1964-1965 Thunderbirds (season 1) 1965-1966 Century 21 Immediately following completion of the first season of Thunderbirds in 1965, AP Films was renamed Century 21 Productions to align it with its growing merchandising sister companies Century 21 Merchandising, Century 21 Toys, Century 21 Music, and Century 21 Publications. 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. This sequence was first used for the two Thunderbirds films that followed the series (Thunderbirds Are Go – premiering 12 December 1966 – and Thunderbird 6 in 1968), and two more Supermarionation series for ATV, Captain Scarlet and the Mysterons (broadcast between 1967 and 1968) and Joe 90 in (1968–69). A live-action film, Doppelgänger (a.k.a. Journey to the Far Side of the Sun) followed in 1969. That same year, Century 21 made its final puppet TV series, the rarely seen The Secret Service (which combined live action with puppetry), after which its puppet studios closed and its merchandising and publication subsidiaries contracted rapidly. Its first and only all-live action TV series, UFO (1970), proved to be its last production. Although a second series of UFO was planned, the project failed to progress beyond substantial pre-production work. Group Three 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. Although no longer owned by Grade, the company maintained a close professional relationship with him. Other notable people Although most notable for its link with Gerry and Sylvia Anderson, the company features other notable figures in its history. Barry Gray composed and arranged the scores for all Anderson's independent productions up to and including the first series of Space: 1999 in 1975. Second unit director Brian Johnson would go on to become a leading