By Amy Ryan
Updated September 29, 2006 at 12:00 PM EDT

Another PopWatch HeadScratcher to get you through the weekend:

What do these five TV series have in common?

American Dreams
Boston Public
CSI: Crime Scene Investigation
Fear Factor
The Surreal Life

Send your best guess to Be sure to write “HeadScratcher” in the subject line and include your first and last names in your e-mail. We’ll post the most interesting responses Monday afternoon.