That said, speaking of "Spearhead..." and watching the early Pertwee stories, Pertwee hamming for the camera when he is being menaced by a special effect is easily some of the funniest stuff on television.
I'd have loved to see Pertwee and Shatner do something together in their prime to see who could chew the most scenery.
OMG Imagine had they done a 3rd Doctor story with Kirk and him together.. haha that would have been special.
Kirk and the Third Doctor would have kicked some serious ass!
I agree that Pertwee seemed to play the Doctor a lot more seriously, especially during the first two seasons of his run. His Doctor could be a downright asshole to the people around him.
And that is why some of us liked him. But the 4th Doctor was my first introduction to Doctor Who.. So I saw them all in a jumbled manner.