Many remember Steven Mond as Robbie, the friend of Arnold on the sitcom Diff'rent Strokes who infamously pressures him to use drugs. Mond was a seasoned pro when he started on the series, having already cut his teeth on shows like CHiPs and Quincy, M.E., and he would stay with Diff'rent Strokes until 1985. He then retired from show business, and eventually became a lawyer.