James B. Sikking Dies: ‘Hill Street Blues’, ‘Doogie Howser, M.D.’ Actor Was 90 DeadlineJames B. Sikking, of Hill Street Blues and Doogie Howser , Dead at 90 TVLineActor from groundbreaking 1980s TV police drama dies at age 90 cleveland.com‘Doogie Howser, M.D.’ and ‘Hill Street Blues’ star James Sikking dead at 90 Fox NewsActor James Sikking, of Hill Street Blues and Doogie Howser, M.D. , Dies at 90 TIME