You struck gold when you went into Toshiko's dazzling mind. No matter what happens, the maths crop up--I suspect it's only numbers that kept her together at all during that time, and I bet her last thoughts in Jack's arms weren't of Owen, or the team or herself, but of algebra, or sums, or the square root of armageddon.
Something so reliable about maths....
Thank you so much for this gripping piece.