Dynasty - Season 4 Episode 7 : Tracy 1989

At the store where he bought the poisonous mercuric oxide, Adam distracts the salesman and substitutes the authentic purchase order with the document Alexis unknowingly signed. Bill Rockwell, the retiring head of Denver-Carrington's public relations department, breaks the news to his disappointed assistant, Tracy that Krystle has been given the position she had planned on assuming. Mark proposes marriage to Krystle. When she refuses, he attacks her. Alexis is shocked to find her signature on the purchase order for the deadly chemical compound. She quickly realizes Adam has framed her. Blake threatens to call the press if she doesn't return Jeff's stock and cancel the corporate merger.