or "Is There a Doctor in the Horse?" before Wiles apparently demanded it be changed. Cotton recalled that the third episode's title, "Death of a Spy", was forced on him after the script had been written, requiring him to introduce the character Cyclops, though some evidence contradicts this statement. Derek Martinus—who had directed the two previous serials, Galaxy 4 and "Mission to the Unknown"—was discussed as a possible director of The Myth Makers in June 1965, though the role was ultimately assigned to BBC staff director Michael Leeston-Smith. It was his only work for the show, though Wiles later wrote to him in hopes that they would collaborate again. Designer John Wood visited the British Museum to research Trojan architecture and discovered that their building style had been basic, generally carved from large stone pieces. Costume supervisor Daphne Dare was deputised by Tony Pearce for the first episode, while regular make-up designer Sonia Markham was unavailable for the first two episodes, replaced by Elizabeth Blattner, who had supervised the show's first two serials. Cotton brought composer Humphrey Searle from Third Programme to write music for the serial; he conducted a group of eight musicians from the Sinfonia of London—who had previously produced music for Cotton's Greek trilogy on Third Programme—to provide about 14 minutes of music cues, significantly consisting of guitar and horns. Casting and characters On 21 May 1965, Maureen O'Brien and Peter Purves were contracted in their roles until the end of The Myth Makers. During the production break after the filming of Galaxy 4 and "Mission to the Unknown", Wiles had decided to renew Purves for a further 20 episodes, while not renewing O'Brien's contract, having witnessed her arguing about her lines during rehearsals for Galaxy 4. O'Brien and Purves were informed of Wiles's decision on 3 September. O'Brien was shocked, as she had returned from holiday expecting to maintain her regular role; however, she was ultimately glad to move on, as she had disliked the role and the scripts. Vicki's departure required rewriting, as well as an introduction of a new character to replace Vicki, who had already been written into the script for the next serial, The Daleks' Master Plan. On 9 September, Adrienne Hill was contracted to play Katarina in five episodes; she was cast by the production team of The Daleks' Master Plan. Cotton brought actor Max Adrian to play King Priam. Playing