The Cognition Shift was the fourth and final story in the audio anthology Hearts of Darkness, produced by Big Finish Productions. It was written by Lisa McMullin and featured Derek Jacobi as the War Master.
Publisher's summary
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Plot
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Cast
- The War Master/ The Doctor - Derek Jacobi
- The Doctor / The Master - Paul McGann
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References
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Notes
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Continuity
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External links
- Official The Cognition Shift page at bigfinish.com