Derrick Sherwin joined the Doctor Who production office during the latter days of Patrick Troughton’s tenure as the second Doctor. As Story Editor, Script Editor and eventually Producer, he became deeply involved in the planning of the changeover from Patrick to Jon Pertwee – the third Doctor. In this fascinating Myth Makers, Nicholas Briggs uncovers the quite detailed planning that went into the changeover, the creation of UNIT and the fact that the switch to Earthbound stories would have gone ahead even if Patrick had stayed!

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