Interesting that you should bring up the ganger Doctor's inability to regenerate (sorry for butting in here), because, well:
Doctor: OK, so, basically better regenerate, that's what you're saying?
Interface!Amelia: Regeneration disabled. You will be dead in 32 minutes.
We've also got the Doctor showing up in a new coat, rather similar to how the ganger!Doctor and the Doctor distinguished themselves via shoes earlier.
I'm still not 100% exactly who is who and what's going on where, but I think we're seeing some sort of bait-and-switch occur. The ganger is poisoned and then goes to die on the beach (?).
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Doctor: OK, so, basically better regenerate, that's what you're saying?
Interface!Amelia: Regeneration disabled. You will be dead in 32 minutes.
We've also got the Doctor showing up in a new coat, rather similar to how the ganger!Doctor and the Doctor distinguished themselves via shoes earlier.
I'm still not 100% exactly who is who and what's going on where, but I think we're seeing some sort of bait-and-switch occur. The ganger is poisoned and then goes to die on the beach (?).