The War Master: Hearts of Darkness • Episode 4 The Cognition Shift Sets: The War Master 4.06/ 5 39 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! View Rating Distribution Ratings are from TARDIS Guide members only. Characters Eighth Doctor Morski The Master The War Master Dorada, the Scaramancer Where to listen to The Cognition Shift: The War Master: Hearts of Darkness Average. Rating: 70%