Cheryl Todd

Cheryl Todd moves through Mindhunter's world of interviews and case files as one of the ordinary people caught at the edges of the Bureau's early profiling work — watchful, guarded, unshowy. She reveals little of herself, giving the impression of someone more comfortable listening than being examined.

Grace Rex plays her with a restraint that suits the show's clinical tone, letting small hesitations and clipped answers do the work rather than any big emotional display. It's a performance built on withholding, which fits neatly into a series obsessed with what people choose not to say.