High Quality Content by WIKIPEDIA articles! Farnsworth "Dex" Dexter is a fictional character on the American TV series Dynasty. The character was introduced as a love interest for Alexis Colby in episode 69. He will become her third husband, and arguably the second great love of her life, after Blake. Even after their marriage ends, Dex remains a strong force in Alexis`s life. The role was originated by Michael Nader in 1983, and remained on the show until the final episode (#220) in 1989. Dex did not return for the 1991 miniseries Dynasty: The Reunion.