I'm a fan of the TV series, Mad Men. The show, set in the 1960s features an advertising agency, where there's a lot of drinking, and smoking, and sleeping around going on.

So, it's a natural that the star of the series, who portrays a guy who drinks, smokes, and sleeps around more than the rest of `em, would appear on Sesame Street.

Huh? Really?

Yep.

Here's Jon Hamm hangin' with the Muppets.