7x13 - Falcon Crest

After Vicky vanishes from Angela's party, Richard and Eric frantically search for her. After Dan is surprised by the arrival of a half-sister whom he didn't know he had, he puts her to work in the grape fields. Shannon tries to leave the valley after Lance questions her. Melissa is able to deflect Angela's scheme to get her committed so that Angela instead loses her hold on Dan. Angela succeeds in prying into Maggie's affairs.