Dynasty - Season 5 Episode 5 : The Trial 1989

Blake visits Dominique at La Mirage to discuss her recent revelation. She tells Blake that her mother was a long-time mistress of his father and has evidence to prove it. At Alexis' trial, a neighbor offers powerful evidence that incriminates Alexis. Along with Mark, she saw a woman on the terrace wearing a cape that has been positively identified as Alexis. Blake is called to testify and states that Alexis would indeed commit a violent act if sufficiently provoked. In a dramatic courtroom scene, Steven is called to the witness stand and he must tell what he knows or protect his mother.