 The script describes the Room of Sleep as containing "special couches" that enable users to condense a full night's sleep into one hour.This episode's scale model work included the construction of entire miniature streets, a task that could not have been accomplished without the larger budget that episodes of "Captain Scarlet" enjoyed compared to those of earlier Supermarionation series.It was on the street sets that the transporter hi-jacking was filmed – a scene that Derek Meddings, the series' special effects director, remembered for its atmosphere.