When Game of Thrones debuted in 2011, it quickly earned a reputation as one of television’s most ambitious and influential dramas. Among its sprawling cast of houses, the Targaryens loomed especially large — a once-exiled royal family that had ruled Westeros for nearly three centuries before the events of the series.

A new " Game of Thrones " prequel, set a century before the events of HBO's once-juggernaut is set to drop this weekend.

Speaking of Thrones, series alum Sophie Turner leads this six-episode heist thriller for Prime Video, playing an office worker at a pension-fund investment company who gets caught up in the largest ar...