Since We'll Forget

Post-LOTSD, the Doctor and Yaz try to take a relaxing trip to an oddly-named planet. On their way to dinner, they find themselves faced with an old foe.

They'll meet new friends, save alien life, reveal untold secrets... but will they remember any of it?
____________

I had to have a story that fits with canon and gives me a satisfying Thasmin moment. So here it is.