Now that Peter is back in the saddle, we've got some business to attend to in tonight's "Wallflower." The Fox press release calls it a "matter of life and death," but isn't that every episode of this show? Whatever.

A man mysteriously dies by an invisible force, and his body rapidly begins to turn "ghostly white" -- and he's not the only corpse currently undergoing this freaky hue fading. Also, Olivia suffers from migraines, which she can probably settle with a glass of water and some ibuprofen... case closed!

The Season 4 fall finale of Fringe is tonight at 9 PM on Fox.

Think you're a TV or movie expert? Prove it! Play Trivia Without Pity, our new online trivia game with over 2,000 questions about the shows and films you love -- and love to hate.

What are people saying about your favorite shows and stars right now? Find out with Talk Without Pity, the social media site for real TV fans. See Tweets and Facebook comments in real time and add your own -- all without leaving TWoP. Join the conversation now!