Ruth Moran

Ruth Moran is Bill Tench's wife, keeping their suburban household running while her husband disappears into interviews with killers he won't describe to her. She wants an ordinary family life — a stable home, a son who is happy — and meets Bill's silences with patience that is starting to wear thin.

Amelia Campbell plays Ruth as the show's quiet register of cost: she doesn't chase drama, she just watches her husband go somewhere she can't follow and absorb what comes back changed. The performance is understated, but it's the domestic ballast that makes the FBI scenes land — she's what Bill is failing to protect.