Dean Stockwell, a top Hollywood child actor who gained new success in middle age in the sci-fi series Quantum Leap and in a string of indelible performances in film, has died. He was 85.

Dean Stockwell, an actor with a career that spanned more than 70 years, died on Sunday. He was 85. Among his best credits were a leading role in the sci-fi series “Quantum Leap,” “Air Force ...