I just saw that there's a fourth season! It includes Kelly Clarkson, Jim Parsons and Chris O'Donnell to name a few!

I love this show WHY was this show cancelled???? I looked forward on Fridays just to watch this show. You get people interested in a show and them BAM you so no more.. Very sad that it will not be coming back!!!!!!!

Please,please reconsider renewing this educational and very interesting show. Im so tired of rude and vulgar sitcoms geared for teenagers. We adults should have some consideration too, besides,the kids arent home on fridays anyway.

We loved this show so much. Espically on Friday nights when networks fear to air anything with any substance. I will miss it, and if our voices carry any weight at all we would be very happy if NBC could renew the show.

I'm Really upset that they take off Good as well as an Educational program like Who Do You Think You Are, to put on more crap television programs. I have always looked forward to this show and watched for it each new season. But, by all means keep canceling programs people actually like and fill your programming up with crappy shows. I understand that NBC is always fighting for their ratings but you don't cater to those of us that like to sit down and watch good wholesome programs. I just don't get it! This doesn't make any sense.

I've been waiting to see when this show would return. I can't believe it hasn't been renewed. We looked forward to watching it every Friday night. It was always educational and facinating the way they could trace back a persond family tree. The networks need to pay attention to what the public wants and stop giving us what they think we should watch. There are too many sit coms and dumb reality shows on.

I am in the 18-49 age group and I loved this show. It was one of the few things on during primetime that I could actually watch with my children. Not only were the subjects' personal journeys captivating, but it sparked interest in my family to research our own genealogies,and learn more about history. It's very sad that NBC canceled a worthwhile show,probably to make room for more crap. I hope they will reconsider

Who Do You think you are isn't coming back in 2013?? I think if this is the case, somebody at NBC should rethink this. I love that show and couldn't wait to watch it every friday night! Please bring it back. Take some other trashy reality show off and put Who do you think you are in that spot!!!! This is history, and very interesting! I love watching everything unfold! Bring it back!!!

Who Do You Think You Are was my favorite show. And when I think about it I don't watch to many programs on NBC. So the next time I see across my screen that my cable company will be cancelling NBC because of contract issues. I will not be contacting them for my support. Who Do You Think You Are best reality show, dealt with real life and made us want to know more about ourselves. I am so very disappointed in fact I had hope they would have added more shows. I sure hope another network picks it up. Maybe you should considered most people who do watch TV don't fit into your 18-49 age group.

Why oh why did you cancel this show??? One of the few shows that could be seen without bad issues, sex related issues, violence, etc. One can find these types of shows anywhere on TV, you had a "one of a kind" show.