Instead of trying to get away, the Doctor walks towards River, knowing what’s coming. She knows it too, and it terrifies her, and yet he seems completely unafraid, not trying to get away, just standing there ready to sacrifice himself, like a martyr for some cause perhaps nobody can fully understand.
“I can’t stop it.”
“You’re not supposed to. This has to happen.”
She begs him to run, but he refuses; he already tried that. Didn’t work.
“This is inevitable, a fixed point.”
Not on River’s watch, it isn’t. Fixed points can be rewritten. She fires, repeatedly, and…