Alyson Hannigan

How I Met Your Mother

Why It’s Smart: TV has given us Friends who live and hang out together, as well as the gang at Cheers. CBS’ Mother did not simply merge those winning set-ups but did them one better by shrewdly establishing a "finishing line" right in its title. So as awesome as Barney is, and as adorably Canadian as Robin is, and as hot monkey-sextastic as Lily and Marshall are, we are left to wonder every week: How did Ted meet his future kids’ mother? And who is she?

How Smart Is It? Like, Doogie Howser-child-doctor smart.

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http://www.tvguide.com/PhotoGallery/Smartest-Shows-Television-1002313/8.aspx