third. Grade commissioned the series immediately. Anderson always claimed that he invented a futuristic vehicle as an excuse to reduce the amount of walking the marionette puppets had to do, which could never be made to look realistic. This was taken to its conclusion in Captain Scarlet, in which the marionette puppets are almost never seen walking. Many of the first 26 scripts for Supercar were written by brothers Hugh and Martin Woodhouse, at the rate of one complete "shooting (camera-ready) script" per week; this was done by the brothers to fit Anderson's (and Grade's) cost, and production schedule. There were several working models of Supercar, which was designed by art director Reg Hill. The larger, hero model was made of lightweight wood and Perspex (Plexiglas), and measured about seven feet (2 m) in length. It was built by Laurie Barr of Aeronautical and General Modelmakers Ltd (now Mastermodels). A mid sized model (around 1 m in length), sculpted by Slough craftsman Bill James, and another smaller model (approximately 0.5 m) were used for the titles. One of the smaller models, used in distance shots, was about nine inches (23 cm) in length and was also sculpted by Bill James. Fans such as Austin Tate have speculated that Hill was inspired by the style of vehicles such as the 1954 Ford FX-Atmos concept car. In 1959, Ford displayed an actual flying car, the Ford Levacar Mach I. Principal photography on the first 26 episodes began in September 1960 and ran for about 12 months, with the production filming one episode every two weeks. As filming progressed, Gerry Anderson married dialogue director and voice actress Sylvia Thamm. After a brief midday ceremony, the couple returned to the studio to help complete the opening title sequence. The series' scale model aerial photography effects were created by filming the miniatures in front of rear-projected footage of a cloud-filled sky, shot from an Airspeed Oxford flying at . This marked APF's first use of rear projection effects. To film Supercar shooting out of the sea, the crew set up a garden swimming pool and yanked the submerged miniature model out of the water on a fishing line. Sets featuring vegetation used cuttings from real trees for greater realism. Filming on the series' second production block, comprising its final 13 episodes, began in October 1961. Regarded as "Series 2" of Supercar, the final 13 episodes