Tonight is the long-awaited premiere of Battlestar Galactica: Razor, the two-hour TV movie that takes place during season two of the critically-acclaimed space dystopia series. It's been so long since season three ended that your memory may have gotten rusty. Here's a roundup of the critical data you'll need to enjoy Razor tonight at 9 PM:

• Everything You Need to Know About Razor. Here's the crucial background from season two episodes that shed light on the plot twists in Razor.
  
  
• Everything You Need to Know About the Flashback Webisodes. SciFi has aired a series of two-minute webisodes that flash back to the first cylon war. Here are the ones you must watch.
• Gay Cylons Can Be Your Allies and Friends. Will you still think so after tonight's episode?
• Leaks from Starbuck's Mouth for Season 4. Here's what Katee "Starbuck" Sackhoff told fans at a recent convention. You'll want to know after Razor.

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