David McCallum, NCIS’ Beloved Ducky Actor, Dies At 90

Nearly six years after he left the long-running crime procedural, NCIS‘ Ducky actor David McCallum has died at the age of 90. McCallum was one of the primary cast for the first 15 seasons of the CBS drama, portraying the agency’s eccentric chief medical examiner Dr. Donald Mallard, affectionately nicknamed Ducky based on his last name. In addition to providing insight for the victims of their cases, Ducky was often a point of emotional and moral comfort for Jethro Gibbs and his team.