What same features does William Shatner have in this old picture and in this recent picture?

Question

What same features does Willam Shatner have in this old picture and in this recent picture? How can you tell it's these same guy in these 2 pictures: http://www.imdb.com/media/rm4000290816/nm0000638

http://www.imdb.com/media/rm2584254464/nm0000638

Answer 1

Same hairstyle & facial expression

Answer 2

His sly, confident smile, soulful, yet focused look in his eyes. In both photos, he's overflowing with virility and confidence. Plus, he's fashionably clad.

A true classic.