Jamie 's brother , Jack , came to Dallas and went to J.R. to reveal that he had proof that Ewing Oil was owned outright by Jock Ewing .
The case came to court and the Ewings had a fight on their hands to keep control .
Jamie 's brother , Jack , came to Dallas and went to J.R. to reveal that he had proof that Ewings   was owned outright by Jock Ewing .
The case came to court and the Ewings had a fight on their hands to keep control .