<P> In pre-production, the original proposed title was 45 Minutes From Harlem . The series was originally devised as a joint vehicle for Maude co-star Conrad Bain (after Maude had abruptly finished production in 1978), and child actor Gary Coleman, who had caught producers' attentions after appearing in a number of commercials . </P> <P> The sitcom starred Coleman as Arnold Jackson and Todd Bridges as his older brother, Willis . They played two children from a poor section of Harlem whose deceased mother previously worked for rich widower Philip Drummond (Conrad Bain), who eventually adopted them . They lived in a penthouse with Drummond, his daughter Kimberly (Dana Plato), and their maid . </P> <P> There were three maids during the sitcom's run: Edna Garrett (Charlotte Rae), Adelaide Brubaker (Nedra Volz), and Pearl Gallagher (Mary Jo Catlett). They lived in the Penthouse Suite at 697 Park Avenue in New York City . As Arnold, Coleman popularized the catchphrase "What'chu talkin' ' bout, Willis?" The ending often varied, depending on whom he was addressing . Early episodes addressed typical issues in a family . Later episodes at times though focused on drug abuse, alcoholism, hitchhiking, and crime, among other issues . </P> <P> In Season 1, Charlotte Rae appeared in every episode as Edna Garrett, but she departed the show partway through the second season to star in her own spin - off, The Facts of Life . Following Rae's departure, Nedra Volz took over as the housekeeper, Adelaide Brubaker . Although she was not part of the official main cast and not added to the opening credits, Volz appeared as a frequent semi-regular character . </P>

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