The Office, Chuck, Heroes Drive to January Wins finished atop the list of broadcast-network Websites in terms of average monthly unique visitors (8.6 million), minutes (126 million), and time spent per visit (8 minutes), according to comScore, and the site was propelled by strong performances from The Office (1.1 million unique visitors), Chuck (830,000), and Heroes (667,000).

The Office was boosted by microsite Jim & Pam: A Love Story, social-networking site Dunder Mifflin Infinity, and The Diabolical Blog.

Social networking was also behind some of the success enjoyed by Chuck, with its Mission: Chuck Me Out, and said weekly features such as the Ass Man Quiz and Casey vs. also performed well.

And Heroes was aided by its Heroes Carnival and Heroes Survival Game.