Stuart Margolin was 25 in Women of the Prehistoric Planet when he played the character 'Chief'.
That was over 58 years ago in 1966.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 84, and has starred in 42 movies in total, 41 of those since Women of the Prehistoric Planet was released.
In Women of the Prehistoric Planet, I think Stuart Margolin looks: