Neil Patrick Harris calls late Doogie Howser, M.D. costar James B. Sikking 'one of the kindest, wisest, funniest, and most generous people' he's ever known following veteran actor's death at 90
James B. Sikking dead at 90: Actor who appeared on Hill Street Blues and Doogie Howser, M.D. died at LA home after battling dementia
