William Shatner and his "Hair"

This is William Shatner.  As you can see in this picture, it looks as if he really did have hair at some point in his life.  I say that because there is a lot of controversy as whether or not he wears a toupee.  I really do not know for sure but while watching the original Star Trek television show it seems he has straight/wavy hair.  

The above is the mid 80's he has curly/fro type hair.  It is clearly a whole different type of texture/color then back in his Star Trek days.  I know hair changes with age.  But this really confuses me.  

And now of days its cropped to the point that is hard to gather what it would look like if it were longer.  

All in all I know which way I am leaning.  Nevertheless, he is still without a doubt one of the best over-actors that has ever taken the stage or set. 

For more reading on Mr. Shatner's hair, here is an interesting link.  William Shatner's "Hair"