<P> Jeffrey Broderick "Jeff" Colby is a fictional character on the ABC prime time soap opera Dynasty, created by Richard and Esther Shapiro . Portrayed by John James, Jeff Colby was introduced in the show's first episode in 1981 and appeared as a series regular for six seasons until transferring to the spin - off companion series, The Colbys . The character returned to Dynasty upon the cancellation of The Colbys in 1987 and remained with the series until its final episode in 1989 . James later reprised his role for the 1991 miniseries, Dynasty: The Reunion . </P> <P> In the 2017 Dynasty reboot, Jeff is portrayed by actor Sam Adegoke . </P> <P> Jeff's on - again, off - again love affair with Fallon Carrington continues throughout the entire series . Jeff and Fallon are married early in season 1, but divorce in season 3 . They plan to remarry in episode 88 (of season 4), but are delayed for over a year when Fallon disappears . They are eventually remarried in season 6 (season 1 of The Colbys) and divorced, again, in season 8 . Although they have a brief affair at the end of season 8, they do not reconcile again until the 1991 reunion miniseries . The couple had two children, L.B. and Lauren, during their turbulent marriages . </P> <P> People described Jeff as Fallon's "loving - but - unloved" husband in 1982 . In the article, James said of the relationship between Jeff and Fallon, "There's an attraction there in two people who know they're wrong for each other". </P>

How is jeff colby a carrington on dynasty