Through the course of the play, Iago also meets Psychostrategist Carnell (Scott Fredericks, reprising his role from Blake's 7) and makes it clear that he knows what a psychostrategist is and about the Federation; with Carnell remarking that he must be the only other person on the planet with this information.
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Kaldor City is a human city of the future on an unspecified alien world, created by Chris Boucher for the Doctor Who serial The Robots of Death broadcast in 1977, and reused in his Past Doctor Adventure Corpse Marker in 1999.
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Skulduggery by Fiona Moore and Alan Stevens, centers on a scheme concocted by Carnell, at the behest of Landerchild, to assassinate Chairholder Uvanov using a skull covered in contact poison.
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The fourth play in the series is Taren Capel by Alan Stevens, and focuses on Iago's attempt to get to the bottom of a scheme apparently instigated by Taren Capel before his death, and continued by the Church of Taren Capel.
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Boucher gave his permission, working closely with producer Alan Stevens in creating a vision consistent with all that had gone before whilst also creating a new and interesting ongoing story.
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The title of the play is derived from The Hidden Persuaders by media theorist Vance Packard and is partially an attempt to introduce some of the themes of his work into the series.
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