Weirdsister College Season 1 Episode 7 Dr. Foster, I Presume!

Milly is concerned about Ben beginning to "forget" her, when he becomes surrounded by other girls. She decides to take precautions with a forget-me-not potion, but Ethel tricks her into drinking it herself. Starfinder attempts to build a machine that will "get around" the Foster's effect, with a little help from Dr. Foster's forgetful assistant, who may not be so forgetful.