Watch Previews of CBS' New Fall Pilots

Check out clips from Accidentally on Purpose, The Good Wife, NCIS: Los Angeles and Three Rivers

Alex O'Loughlin is officially back on television. It's time to rejoice!

Check out his new pilot Three Rivers, the organ-donor medical drama, in the preview above. Also in the clip above are sneak peeks of The Good Wife (starring Julianna Margulies), NCIS: Los Angeles (the NCIS spinoff with LL Cool J and Chris O'Donnell) and the comedy Accidentally on Purpose, which marks Jenna Elfman's reemergence on television.

Enjoy the peeks above and below and then hit the comments with which fall CBS show you're most looking forward to.

You can also check out previews of the ABC pilots here, the NBC pilots here and the Fox pilots here. Plus, don't forget to check out our gallery of fall TV shows...