It's on Fox. Wednesday @ 8pm. I paged thru a week's listings and didn't see any rebroadcasts, but each episode is the same idea with different people.
Gotta admit, the cynic in me is wondering how they talk people into giving away $100K of their own money. Is there some tax break or benefit they get in return that they're not mentioning on-camera?
The first episode had a rich father/son move into a poor, polluted neighborhood in southern CA. The second had a husband/wife from New Orleans move into a small town still devastated today from Katrina.
Edit: You can watch them online, free,
right here. Hulu.com has tv shows & movies available online. They've got the first 2 episodes, about 45 minutes each, and several trailers.