Jason Isaacs was 24 in The Tall Guy when he played the character 'Doctor'.
That was over 35 years ago in 1989.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 60, and has starred in 101 movies in total, 94 of those since The Tall Guy was released.
In The Tall Guy, I think Jason Isaacs looks: