A look back at the NCIS star — and PEOPLE's Sexiest Man Alive in 1986 — through the years Jack Hamilton/NBCU Photo Bank/NBCUniversal via Getty Happy Birthday, Mark Harmon! PEOPLE's former Sexiest Man ...

A dependable presence on television and in the occasional feature for decades, actor-producer Mark Harmon broke free of roles that hinged on his all-American looks and appeal and displayed a talent ...