Yesterday, I was wondering about the networks buying Canadian or British shows. I was reading this Variety article and came across this about NBC:
Contingency plans: Net has already pulled the plug on "Heroes: Origins," citing the uncertain future of the WGA talks as a reason. Look for more cost-saving moves as NBC bulks up on reality -- and maybe even buys some already-produced episodes of British or Canadian shows.
I recommend the article as a whole. It has a network by network breakdown of the season so far and the contingency plans.