The War Master: Hearts of Darkness • Episode 4 The Cognition Shift Sets: The War Master 84% 80 votes TARDIS Wiki Share this page {{ shareFeedback }} Copy link {{ copyFeedback }} Overview Reviews Released Wednesday, October 28, 2020 Written by Lisa McMullin Runtime 68 minutes Locations Nastrum Login to track and rate! Signal Strength: 40% What's this? Characters & Enemies Eighth Doctor The War Master Also featuring: Morski Dorada, the Scaramancer Available in: The War Master: Hearts of Darkness Average. Rating: 69%