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.

Fallon Carrington is a fictional character from the ABC television series Dynasty and its spin-off The Colbys. Created by Richard and Esther Shapiro, the role of Fallon was originated by Pamela Sue Martin in the show's first episode in 1981, and Martin left at the end of the fourth season in 1984. Fallon was recast with Emma Samms in 1985, and the character was spun off onto a companion series called The Colbys. After the cancellation of the second series, Fallon returned to Dynasty in 1987, and remained on the series until its finale in 1989. Samms later reprised the role for the 1991 miniseries Dynasty: The Reunion. Elizabeth Gillies plays Fallon in The CW's 2017 reboot series Dynasty.