Firstly I added the throat with the teeth and tongue, because this character will open his mouth when he is facing the void. Though, I did not rig the tongue as it wont have any effect on the animation and it saves me sometime.
After I did the blink, a really elaborate process that took some time to do, then I quickly added the eye control, so I can move the eyes.
Pretty simple process which is really well explained in Alan's tutorials. and which i haven't found any problem thus far.
I have set up a quick test, to show the controls working:
And so he moves!!