<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> 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>
who played jeff colby in the original dynasty
who played jeff colby in the original dynasty
John James
John James