Ben reunites with an ex who's suffering short-term memory loss. Elsewhere, Fitz plans to set his mother up on a date but is surprised to learn she doesn't need his help; Riley's new love interest has an unusual fetish.

Sara asks Aaron to bid for her during a bachelorette auction in order to avoid a date with a coworker. Elsewhere, after a faux pas, Ben is accused of sexual harassment at work; Fitz has one last night out before committing to monogamy and ends up scrambling to get rid of the evidence.