was soon joined by new producer John Wiles, and they immediately developed a positive working relationship, wanting the show to move away from "childish" science fantasy and towards more historical stories and adult science-fiction, the latter inspired by authors Ray Bradbury and Isaac Asimov. As the first three stories of his tenure—The Time Meddler, Galaxy 4, and "Mission to the Unknown"—had been commissioned by his predecessor Dennis Spooner, The Myth Makers was the first serial for which Tosh assumed full control. He contacted Donald Cotton—whom he had known since the latter was a student at Guildhall School of Music and Drama—and invited him to submit a story idea for Doctor Who. Cotton was initially hesitant as it was an unusual field for him, but agreed if he could select the subject matter (the Trojan Horse) and some of the crew (which included his colleagues from BBC Third Programme), to which Tosh and Wiles were satisfied. Cotton had written several pieces about Greek mythology for Third Programme, prompting the similar subject matter for Doctor Who. Tosh remained wary of Cotton's ability, as he knew of the writer's inexperience with television drama; prior to a script commission, Tosh requested a storyline in late April 1965. Cotton used several resources to research historical facts, including The Cambridge Ancient History, A History of Greece to 322 B.C. by N. G. L. Hammond, The Origins of Greek Civilization by Chester Starr, and A Companion to Greek Studies by Leonard Whibley; he noted several inconsistencies between the texts and that several of the Greek names in them (and in Homer's Iliad) were corrupted variations of their true Greek form. Cotton wrote that the Trojan Horse was "almost certainly completely myth" but found it compelling to include within the script with the Doctor's involvement. Cotton officially commissioned the first two episodes of the serial—then titled Doctor Who and the Mythmakers—on 13 May, with a target delivery date of 4 June; the last two episodes were commissioned on 11 June, with the serial now titled The Myth-Makers. Wiles was excited for the story to be both intellectual and humorous, describing it as "high comedy". Documentation in mid-July listed the serial as Dr Who & the Trojans. The episode titles changed over time, especially as the BBC vetoed Cotton's use of puns in the titles: the first episode was originally "Deus ex Machina", and the fourth was once called