Context: The initial 1985 miniseries cast Patrick Swayze as Orry Main and James Read as George Hazard with Lesley-Anne Down as Orry's love interest Madeline and Wendy Kilbourne as George's future wife Constance. Kirstie Alley played George's outspoken abolitionist sister Virgilia, with Genie Francis as Orry's "good" sister Brett and Terri Garber as his selfish and wicked sister Ashton, as well as Philip Casnoff as Elkanah Bent, George and Orry's nemesis. All of these actors returned for the 1986 sequel, joined by Parker Stevenson as Billy Hazard, George's brother and Brett's husband.

Question: who played billy hazard in north and south?
Steam of consciousness below:
To answer this question, we should know that: All of these actors returned for the 1986 sequel, joined by Parker Stevenson as Billy Hazard, George's brother and Brett's husband.
So, the answer is Parker Stevenson.