Henning's approach to magic and performing was different from earlier magicians. While magicians usually performed in black psychology in college, to know how the human mind works., Henning wore colorful clothes. He also studied
Henning is credited by many for the resurgence of the public's interest in magic, thanks to his breakthroug Broadway show, The Magic Show, which opened in 1974 and ran for almost five years. This was followed by eight television specials on NBC (the first of which remains the most watched magic television special in history, with over fifty million viewers). In 1982, he appeared in another Broadway show, Merlin, which ran for seven months. Though the magic in Merlin was met with accolades, critics trounced the show's book and music.
Henning was a spokesperson for Polaroid, TWA, Minolta and Chrysler.
He was a student of the Maharishi Mahesh Yogi, and used transcendental meditation to help him focus and to relax. He tried to help the Maharishi open a theme park, called Vedaland. Henning also ran for in Canada, but lost the election.
Henning died in 2000 of liver cancer. Instead of normal medical treatments, he tried to cure himself through natural and diet, but this did not work. After his death, Henning's widow kept the Vedaland campaign going.
The first and only written biography of Doug Henning, Spellbound: The Wonder-filled Life of Doug Henning was published in 2009 (John Harrison, BoxOffice Books, New York.)