If you go to this link, it looks like the segment will be archived there after airing.
UPDATE: watch video here
From the site:
The Watch List: The medication of foster children
On this week’s episode of Need to Know, we go inside the foster care system for an installment of The Watch List: We investigate the use and potential overuse of powerful antipsychotic medication on foster children, with a special look at Texas, which has worked to reform its practices. (for future archive)
Check your local stations for time. Sometimes the date varies in specific locations as well.