I thought Keith Hamilton Cobb was excellent as Tyr, one of my all time favorite bad-asses in SciFi.
Steve Bacic as Radu, he's a pretty wooden actor, but, DAMN, he's nice to look at
Most of the females, I thought were pretty good too. The guy who looks a bit like Sean Faris and the Blonde Horror actor that chews gum (Beka's Progenitor, I believe), yea, they weren't charismatic actors, either. James Marsters was pretty good, though, IMHO
Steve Bacic as Radu, he's a pretty wooden actor, but, DAMN, he's nice to look at

Most of the females, I thought were pretty good too. The guy who looks a bit like Sean Faris and the Blonde Horror actor that chews gum (Beka's Progenitor, I believe), yea, they weren't charismatic actors, either. James Marsters was pretty good, though, IMHO