Watch Neil Patrick Harris and Nathan Fillion Discuss Puppets and Penises

As prophesied in the earlier preview for "Neil Patrick Harris' Puppet Dreams" web series, his Dr. Horrible co-star Nathan Fillion stopped by in a doctor's outfit in the newest episode to examine both NPH's puppet problem and his penis. And by penis we mean "the hammer." But of course by "the hammer" we still mean… » 12/05/12 7:20am 12/05/12 7:20am