Untold Knowledge ~ Four Knocks to Forever

They were supposed to be on their honeymoon.

No invasions. No endings. No impossible choices.

Just the Doctor and Echo Halifax, finally-finally-allowed to exist in the quiet between adventures.

But the universe doesn't forget who the Doctor is.

What begins as stolen moments across the stars quickly unravels into something far more familiar-and far more dangerous. A detour into Victorian London brings them face-to-face with a man who shouldn't exist. A sun-scorched world offers beauty, danger, and a fleeting glimpse of what peace could look like. And then... Mars.

A fixed point.

A moment in time that was never meant to be touched.

As the Doctor begins to push the boundaries of what even he should change, Echo is forced to see the man she loves from a new, terrifying angle-the Time Lord victorious, standing on the edge of something unrecognizable.

And in the shadows, a drumbeat begins to rise.

Four knocks.

The honeymoon was never going to last forever.

Because some stories don't end in forever-they end in sacrifice.

Set during the 2009-2010 specials between Series 4 and 5, this second installment follows the Doctor and Echo through a journey of love, defiance, and the slow, inevitable approach of goodbye... where every adventure brings them closer to the moment neither of them is ready to face.