Is there a spell to make someone remember something?

maybe not a spell, but a few Herbs will do the trick and a good nights rest.

Ginko Boloba is fantastic for memory loss. It slowly opens brain cells, allowing blood and other fluids to function normally. 1 mes later and started remembering childhood phone numbers.

A good night Sleep , exercise and a decent Multivitamin and your brain will be so fine tuned, you'll be able to receive Interplanetary transmissions from another galaxy.

yes there is actually the remeberance spell