Jeff Harris and Bernie Kukoff's sitcom "Diff'rent Strokes" debuted in 1978 and ran 189 episodes over a whopping eight seasons. The series starred Gary Coleman and Todd Bridges as Arnold and Willis Jackson, two impoverished kids from Harlem whose mother had recently died. They were adopted by the wealthy Mr. Drummond (Conrad Bain), a Park Avenue millionaire. The series revolved around the relationship Arnold and Willis developed with their adopted father, new sister Kimberly (Dana Plato), and one of three kindly housekeepers. In the 1984 season, Mr. Drummond married a woman named Maggie, and she was played by Dixie Carter for two years before being replaced by Mary Ann Mobley.

"Diff'rent Strokes" wasn't just overwhelmingly popular, but it also served as a template for a decade's worth of booming sitcoms. It was "Diff'rent Strokes" that famously presented "very special episodes" about serious issues like drug addiction, homelessness, eating disorders, and looking out...