A Shocking Backstep

Sherlock and Molly are struck down during a big argument. When they wake up, they share burns, but also a very unique gift that will serve as their means to reconciliation.

Bonus:
They say that to really understand someone in the present, you have to understand their past. But what would happen if you could go back and actually bear witness to the defining moments in a life which shapes the person into who they are now?