The bleeder valve from Roger's car, used by angry son David in the hope of offing dear old dad.
Julia's medallion, used to make people. . .um, forget stuff.
Nicholas' cigarette case, which easily hypnotized Tony Peterson.
Petofi's hand, Judah's head, Judah's body, Adam's arm, a rifle which will be used more than once in the current storyline, Gerard Stiles' ring.
Love, Robin