When does The Colbys return?

The Colbys is a spin-off of Dynasty. It stars Charlton Heston as tycoon Jason Colby, Barbara Stanwyck as his sister Constance, Stephanie Beacham as his wife Sable, Katharine Ross as Sable's sister and Jason's lover Francesca, and Ricardo Montalbán as Jason's business rival Zach Powers. John James and Emma Samms also star as Dynasty characters Jeff Colby and Fallon Carrington.
On Dynasty, presumed-dead heiress Fallon Carrington Colby reappears alive, suffering from amnesia and using the name Randall Adams. Set in Los Angeles, The Colbys focuses on the extended Colby family as Jeff relocates to California to start his life anew.