Man, Morrow changes his hair style every five minutes.
Sometimes he looks like he does now, other times he looks like a Clayton Foresters doughy older brother (like during the tomorrow woman arc, where his hair went from black to red).
I think he's just such a generic evil scientist they can't decide how to make him look distinct. Ivo has the same problem; sometimes he looks like a normal guy, other times he looks like a scaly lizard man.