Shannen Doherty already done with 90210

After only 4 episodes of 90210, Shannen Doherty is already done. But surprisingly, it's not because of her being Queen Bitch like her reputation says. She was only signed to a four-episode contract, but the producers made it known they would love to have her back for more. The door is still wide open for a return, but right now it looks like she's done.

Now how much sense does that make? She finally gets shoved back into the limelight because of the most anticipated show of the fall, and she decides to just stop after her 4 episodes when the producers want her on for more? Maybe she just likes a quiet life.