Chris Pennock got better and better in my opinion. I really liked the overly dramatic scenes with him and Carolyn when he played Jeb. I thought he was fantastic as Yeager and Gabriel.
Although RD was annoying to most people here, I rather liked his Peter Bradford, and Dirk Wilkins (sp?), and most of all Charles Delaware Tate. The other characterizations left a lot to be desired IMHO.
[spoiler]However, I did enjoy Angelique putting the bite on him, heh-heh.[/spoiler]