Kate Vernon, <I>Battlestar Galactica</i> Kate Vernon, Battlestar Galactica

In case you haven't given our video Q&A with Kate Vernon a watch already, here it is again, timed to this week's series finale of Sci Fi Channel's Battlestar Galactica.

After recapping for us how she came to learn that Ellen Tigh is the fifth Cylon, Vernon weighs in on the impact of that choice. Compared to making Gaeta or Dualla the missing link, she says the Ellen reveal "gave them a lot to play with."

Vernon goes on to tease the big finale, saying, "I wouldn't have thought of this ending in any lifetime. ... It will forever leave fans, in their imagination, spinning their own stories."

Battlestar launches its final, two-hour mission tonight at 9 pm/ET. Find tons of fun features celebrating the finale at TVGuide.com:
• Watch fraktastic video interviews with the cast
• Check out our readers' favorite moments from the series
• Read about the thrilling retrospective at the United Nations
• Read our recap of the finale and weigh in after the episode