Cobie Smulders, Josh Radnor and How I Met Your Mother co-star Alyson Hannigan in 2013.Call her legend – wait for it – dirty.The co-creator of the hit sitcom How I Met Your Mother, Craig Thomas, was shocked to discover on his podcast last week that Cobie Smuldersgot pretty naughty on his set. Cobie and Josh Radnor, who played love interests Robin and Ted on How I Met Your Mother, were talking to Crag