We discuss season 16, the Key to Time, where for David, Doctor Who mingles freely with Dungeons & Dragons. Ben explains how writing a season arc always seems easier than it is and that it's important to know how the arc will conclude before running out of money. David explains why he believes Philip Madoc was not miscast in The Power of Kroll and Ben wishes that the production team of Graham Williams and Tony Read had done a better job of crafting stories for Mary Tamm so she would have stayed for season 17. Opening music is Dick Mill's sound scape for the "White Guardian's Windbells". Closing music is from "The Stones of Blood" soundtrack composed by the Dudley Simpson. This episode was recorded 15 August 2020.