Filmed In Supermarionation is Century 21 Films' celebratory documentary about the culturally iconic puppet series that Gerry and Sylvia Anderson developed to great success throughout the 1960s. This includes Stingray, Captain Scarlet and, most famously, Thunderbirds – programmes six decades old that still resonate with young and older viewers alike, and which continue to find new audiences to this day. Hosted by Lady Penelope and Parker, this feature-length screen adaptation of Stephen La Rivière's book of the same name tells the story of the Supermarionation productions using a wealth of previously unseen archive footage, new interviews with those involved, and clips from the shows themselves. From The Adventures of Twizzle, through Four Feather Falls, Supercar, Fireball XL5, Joe 90, and The Secret Service – the legacy of the pioneering 1960s British team based in Slough is celebrated in this behind the scenes tribute.