Christopher Plummer was 65 in Twelve Monkeys when he played the character 'Dr. Goines'.
That was over 28 years ago in 1995.
In 2021 he died aged 91, starring in 176 films in his career, 85 of those after Twelve Monkeys was first released. If he were alive today he would be 94.
In Twelve Monkeys, I think Christopher Plummer looks: