A genealogy investigation and a knock on the head takes Mac back to King Arthur's court, where he must use his knowledge to prove Merlin innocent of harming the King, find the fair Cecilia and foil Morgana's attempt to take over the throne.

Cast: Richard Dean Anderson, Dana Elcar, Time Winters, Christopher Collet, Colm Meaney, Peter Vogt, Christopher Neame, David L. Considine, Nolan Hemmings