Fall 2009's least-watched shows: Zap2it's Year in Review

(CBS)
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'Accidentally on Purpose' (CBS)

Viewers: 7.96 million

Fall 2009 ranking: 49th

Fun fact: It's the least-watched of CBS' Monday comedies, trailing "How I Met Your Mother" by a little over a million viewers. Still, the fact that a top-50 show is among CBS' weakest performers speaks to the overall health of the network's schedule.