Greg responds...

Michael Dorn was a natural to play Taurus. It was a very Worf-like character in many ways. But because we already had used him as Coldstone, we decided to hire someone else. That person did NOT work out well at all. (That entire episode was a problem. We had another Proteus and another Boreas as well.) Since we had to re-spend the money to recast so many people, I didn't want to take any chances the second time. (There was no way that we'd be allowed a third chance.) So we went with three people we knew we could count on, i.e. Roddy McDowell as Proteus, Dorian Harewood (am I spelling these correctly?) as Boreas and of course Michael Dorn as Taurus.