supplied APF with a list of colours believed to cause problems such as flaring or bleeding; according to Anderson, this was unnecessary because when filmed in Eastmancolor, a set "would appear on screen exactly as you had painted it." Some colours were avoided as they did not come out well in black and white, and models and sets were painted differently to ensure that they did not blend into each other. During the production of Stingray, APF became the UK's largest colour film consumer. As filming progressed, Grade extended his commission to 39 episodes. Around the time shooting on the final 13 episodes began, voice actors Don Mason and Robert Easton, who had understood that all members of the cast were on the same pay, learnt that they were in fact earning less than their co-star David Graham. They did not commit to the remaining episodes until their fees had been re-negotiated. Characters and puppets In her 2007 autobiography, Sylvia Anderson, who had voiced the regular characters of Jimmy Gibson in Supercar and Dr Venus in Fireball XL5, wrote that she devised Marina as a mute so that she could take a break from voice acting and "concentrate on the scripts and characters". Her voice parts in Stingray were limited to uncredited guest roles in the episodes "Raptures of the Deep" (as Marina) and "A Christmas to Remember".Bentley 2008, p. 93. Gerry Anderson said that Phones was inspired by memories of a sound engineer with whom he had once worked: "He spent so long with his headphones plugged in to various bits of equipment that he used to leave them on all the time, earning himself the nickname 'Phones'." Voice actor Robert Easton based the character's Southern American tones on his performance in the 1961 film Voyage to the Bottom of the Sea, in which he played a Southern radio operator. His voice for Surface Agent X-2-Zero was his impression of Peter Lorre, who had appeared in the same film. The Aquaphibians were voiced by Easton and Graham, their dialogue overlaid with a looped tape recording of bubbling water to create a gurgling effect. The process of designing and making the puppets took four months and each of the main characters was sculpted in duplicate to allow episodes to be filmed in pairs. Some of the main characters were modelled on real-life actors; for example, Troy Tempest drew heavily on