Besides producing, William has written an episode of The X-Files, the short films Exchange and Packing Up, and seven episodes of 49th and Main, including the pilot episode.
William once claimed that his character, The Cigarette Smoking Man, was the hero of The X-Files.
As of 2006, William is training with the Whistler Mountain Ski Club Masters Team.
William has skied for his whole life, and since his 30s he has been a masters racer.
As of 2006, William is the Men's 7 Canadian national champion, as well as the Canadian record holder for 65 to 70 year olds, in water-skiing.
William commenced water-skiing competitively when he was in his 30s.
William has worked as an Executive Producer for the show 49th And Main.
His work as a producer commenced with Exchange and Packing Up, both short films.
William commenced his major work as an Artistic Director in the theatre.
He began directing theatre productions at university when another student, who was directing a play, wished to have his assistance. The other student pulled out of the production, and William carried on.
William stars as the mysterious Wealthy Gentleman in his own series called 49th And Main.
Spring 2006 saw William working on five separate projects, four for Insight Films and one for Masters Of Science Fiction.
In the 1960s and 70s, William worked as a theatre director and acting teacher.
In the early 1950s, William was involved with radio drama for CBC.
Despite starring in The X Files, William is a self-confessed fan of the show and watched it reguarly. "Talitha Cumi" and "Two Fathers" are his favourite episodes, along with "En Ami"; the episode he wrote.
William is also a certified downhill ski instructor, another one of his passions in life.
William is a Canadian national champion water-skier for his age group.
He was a smoker, but had quit before his role on The X Files. However his addiction returned when he smoked on set for the role, prompting him to switch to herbal cigarettes.
William is a spokesman for the Canadian Cancer Society.
Though he is credited as having appeared in The Dead Zone movie, he says that he can't even find himself in it.
Davis admitted that his character of CGB Spender on The X-Files was the Devil. He also called himself "Lucifer."
Performed in some other science fiction series like Sliders, Poltergeist and The Outer Limits.
He is married.
In X-files, his character of CGB Spender smokes cigarettes from the brand Morley.
His favorite X-Files episode is "Talitha Cumi" (3.24).
Former drama professor at Bishop's University, Canada, before opening up William Davis Centre for Acting Study.
Wrote the episode "En Ami" (# 7.15) 3/19/2000, which delved into the history of his character, The Cigarette-Smoking Man.
Formerly owned and operated the Vancouver-based William Davis Centre for Actors' Study, an acting school for beginners and professionals.
William: I may be 68 but I still haven't decided what to do when I grow up. You will see that I am an actor, a director, a teacher, a writer, a producer, and a skier.