They had a daughter together.
He also dated Apryl Prose and the couple had a daughter, Wylie.
This fundamentally changed the show, as it forced the producers to introduce a replacement leader for the SG-1 team, which would ultimately be the character of Cameron Mitchell Ben Browder.
For many years he has given his support to the Special Olympics, and he was one of the key speakers at the opening ceremonies for the Special Olympics games in 1991.
Being very nearsighted, he asked to wear his glasses for the reading, and that simple unselfconscious gesture immediately convinced the show's producers that they had found the right man to become their unpretentious hero.
Then rose to prominence as the lead actor in the television series MacGyver.