Robert Trebor has elicited laughter as the avaricious and incorrigible Salmoneus, a shifty dealer who has appeared several times on both "Hercules: The Legendary Journeys" and "Xena: Warrior Princess. " The Bernie Madoff of ancient Greece, Trebor's character is always concocting a get-rich-scheme that inevitably comes at the expense of those hapless people who were foolish enough to hear him out. Trebor has also sent chills up the spines of viewers as David Berkowitz, better known as the serial killer Son of Sam, in the TV movie "Out of the Darkness." The story focuses on the 13-month hunt for Berkowitz, led by real-life New York City detective Eddie Zigo (played by Martin Sheen), but Trebor's brief appearance on screen captivated audiences. In Berkowitz's confession scene, Trebor artfully depicts a man who is not just disturbed but essentially soulless.