Does anyone else think we're going to get a trial of the Doctor by the Timeys? It's one of the major old school tropes the new series hasn't been able to play with yet, for obvious reasons, and it would give us a coherent-ish explanation for old companion cameos if we got snippets of unseen adventures (other possibilities are that it's going to be an Androzani like sequence for the regeneration itself, or that my straw-clutching is right and it is TARDIS travel that protects you from being Master-ised and so we see them vs the Simm Army, though that wouldn't explain Rose as she's off in Pete's World, I suppose).
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