Supermarionation "Thunderbirds", who closely resembled Sylvia Anderson, and Captain Blue in "Captain Scarlet", who looked like Ed Bishop (the similarity was reportedly coincidental). Other characters were based on well-known film actors: Troy Tempest of "Stingray" was based on James Garner, Scott Tracy of "Thunderbirds" on Sean Connery and Captain Scarlet on Cary Grant. "Stingray" also featured the only non-speaking Supermarionation puppet: the water-breathing woman Marina. Occasionally, close-ups of a live actor's hand would be inserted to show actions such as turning keys and pressing buttons. This was affectionately parodied in the 2004 live-action feature film "Thunderbirds", with a brief shot of
Things Which Have Never Yet Been Done was shot with a handheld camera by the episode's director, TJ Scott, with Maslany and Outerbridge improvising the dialogue and use of props. The subsequent shot of the barn on fire was created by the visual effects company Intelligent Creatures. The title of the final two episodes, "Things Which Have Never Yet Been Done" and "By Means Which Have Never Yet Been Tried", are taken from a Francis Bacon quotation in his philosophical work "Novum Organum": "It would be an unsound fancy and self-contradictory to expect that things which have never yet been done can be done except by means