Mark warns J.R. to stay away away from him and Pam. Ray and Donna learn the reason Tony doesn't want to be adopted and ask him to reconsider. Matt wants to surprise Pam with the emerald strike. Jack wants to sell his 10 percent of Ewing Oil back to J.R. Sue Ellen confronts J.R. about his investigation of Dr. Jerry Kenderson. Police detain Angelica. J.R. is slightly disappointed with Harry McSween's working style. Jamie wants to strike a deal with J.R. concerning the Ewings and the Barnes. Cliff gives Mandy another lecture on J.R. Marilee confronts J.R. about the Marinos deal. Donna and Ray bring Tony to dinner at Southfork. Angelica is released by police and heads for Dallas. An earthquake destroys Los Gatos and Pam fears for Matt's life. Sue Ellen turns Jerry's advances down. Mandy changes her mind about leaving Dallas.