AU: When Harry continues to doubt his parents’ romance, the Doctor decides to let the young wizard go back and see for himself.
OCTOBER 31 - NOVEMBER 2, 1981
“Harry… I as good as killed them,” Sirius croaked. “I persuaded Lily and James to change to Peter at the last moment, persuaded them to use him as Secret-Keeper instead of me…. I’m to blame, I know it…. The night they died, I’d arranged to check on Peter, make sure he was still safe, but when I arrived at his hiding place, he’d gone. Yet there was no sign of a struggle. It didn’t feel right. I was scared. I set out for your parents’ house straight away. And when I saw their house, destroyed, and their bodies… I realized what Peter must’ve done… what I’d done…”