A friend once joked that if there was a psychopath in any room, she'd be able to pick him out: he'd be the only man in the room she was attracted to.
In "Only Murders in the Building," Oliver (Martin Short) professes similar powers of deduction using a card game he's seemingly invented called "Son of Sam." Like a homicidal Old Maid, Oliver's game passes the time between drinking, but it also showcases what his son Will says Oliver "thinks is his greatest skill: knowing when someone is hiding a secret from him."
