Farnsworth "Dex" Dexter is a fictional character on the ABC prime time soap opera Dynasty. Portrayed by Michael Nader, the character was introduced as a love interest for Alexis Colby in the series' fourth season in 1983. He became her third husband, and arguably the second great love of her life, after Blake Carrington. Even after the end of their marriage, Dex remained a strong force in Alexis's life. Dex Dexter remained on the series until its final episode in 1989.

Dynasty is an American prime time television soap opera that aired on ABC from January 12, 1981, to May 11, 1989. The series, created by Richard and Esther Shapiro and produced by Aaron Spelling, revolves around the Carringtons, a wealthy family residing in Denver, Colorado. Dynasty stars John Forsythe as oil magnate Blake Carrington, Linda Evans as his new wife Krystle, and later Joan Collins as his former wife Alexis.