(PBS, Getty)We've already met Cora's dear old mom, and next season we'll get to meet another member of the extended Crawley family: Cora's playboy brother.TVLine reports that Paul Giamatti (Sideways, John Adams) will joing Season 4 of the Masterpiece period drama as Harold Levinson, Cora's "maverick" brother and the uncle to Lady Mary and Lady Edith. Giamatti will join a host of other new Downton Abbey faces, including Gary Carr (as the series' first recurring black character), Dame Kiri Te...
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