Jack Ewing
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Jack Ewing, was a character that appeared in the later seasons of the popular American television series Dallas, played by Dack Rambo (1985-1987).
Jack was the nephew of Jock Ewing; the son of Jason "Tumbleweed" Ewing; and the cousin of J.R. and Bobby Ewing.
Jack's sister, Jamie Ewing (played by Jenilee Harrison), arrived in Dallas one season earlier.