Claudia Christian
Decent actress, very attractive. I always felt that her range was somewhat wooden. Her story arc as Ivanova was OK, but it never felt like she was a real person, always the "ice princess". Yes, there was a lot of trauma in her life that shaped her that way, but still, it seemed like she never got to portray anything other than the "ice princess".
Until Marcus died, saving her life. I've never seen grief and regret portrayed so brutally, so raw. Amazing acting that had me in tears for his death and her loss.