Martin Landau was 69 in The X Files when he played the character 'Kurtzweil'.
That was over 26 years ago in 1998.
In 2017 he died aged 89, starring in 127 films in his career, 51 of those after The X Files was first released. If he were alive today he would be 95.
In The X Files, I think Martin Landau looks: