In a cost-cutting move shared with Marcia (1963), Simon investigates the goings-on at Elstree Studios, where this episode was genuinely being filmed.
Wensley Pithey is cast as Claude Eustace Teal, alongside Ivor Dean in a minor role. Dean would achieve fame later in the series by playing Teal as a very different character, establishing a popular double act with Roger Moore, in 23 more episodes.