Question: What American film director and producer introduced the special on Doug Henning's World of Magic where Lori Lieberman was the musical guest?

Context articles: Origami (magic trick)
Gene Kelly
Tony Slydini
Todd Lieberman
Doug Henning's World of Magic
Julie Lyonn Lieberman
Kidney Now!
Ramona Brooks
The Magic Show
Lori Elberg

Origami is a magic stage illusion with a Japanese paperfolding theme, designed by Jim Steinmeyer.
 It was originally performed in 1986 by Canadian illusionist Doug Henning, using a working prop constructed by illusion builder John Gaughan.
 Illusionist David Copperfield later introduced presentational changes that would be widely copied by other performers.
Eugene Curran Kelly (August 23, 1912 – February 2, 1996) was an American dancer, actor of film, stage and television, singer, film director, producer, and choreographer.
 He was known for his energetic and athletic dancing style, his good looks, and the likeable characters that he played on screen.
Tony Slydini (September 1, 1901, Foggia, Italy – January 15, 1991), simply known as Slydini, was a world-renowned magician.
 His mastery, expertise, originality and innovative approach to close-up artistry, magic earned him a legendary reputation in the magic world.
 He traveled the world performing for the public as well as performing and lecturing fellow magicians.
 As a result, he served as an inspiration to generations of well-known magicians, celebrities and entertainers, including Doug Henning, Dick Cavett, Bill Bixby, Ricky Jay, David Copperfield and countless others.
 Although he was best known as a master of close-up artistry, he continually demonstrated an extraordinary performing ability and during his lifetime was responsible for a long series of books, films and publications highlighting his mastery of the magical crafts.
 For his work, he received the highest honors that his profession could bestow, including both the coveted "Masters Fellowship Award" and "Performing Fellowship Award" from the Academy of Magical Arts.
 During his lifetime, Tony Slydini was inducted into the Society of American Magicians Hall of Fame as a "Living Legend".
Todd Darren Lieberman (born February 20, 1973) is an American film and television producer.
 He co-founded Mandeville Films and Television with David Hoberman in 2002.
 Mandeville has produced several notable films, including "The Fighter", which won two Academy Awards in 2010, and for which Lieberman was nominated for the Oscar for Best Picture.
Doug Henning's World of Magic was the first of seven annual prime-time television specials starring magician Doug Henning, which aired live on NBC Friday, December 26, 1975.
 Bill Cosby was the show's special guest, along with Gene Kelly (who introduced the special) and musical guest Lori Lieberman.
 The show ran live without commercials under the sponsorship of Mobil.
Julie Lyonn Lieberman is a pioneer teacher of music improvisation and ergonomic performance.
 She is an American improvising violinist, vocalist, composer, author, educator, and recording artist specializing in fiddle and international violin styles.
 She is among the first to teach improvisation and world music at the Juilliard School; she also created the first eclectic styles teacher training program in the world as Artistic Director for the summer program, Strings Without Boundaries.
 Ms. Lieberman is an author, composer, producer, and performing artist.
"Kidney Now!"
 is the and season finale of the third season of the American television comedy series "30 Rock", and the 58th overall episode of the series.
 It was directed by series producer Don Scardino, and written by show producers Jack Burditt and Robert Carlock.
 The episode originally aired on the National Broadcasting Company (NBC) network in the United States on May 14, 2009.
 Guest stars in this episode include Alan Alda, Kay Cannon, Donald Glover, Napiera Groves, Chris Parnell, Paula Pell, and Sherri Shepherd.
 In addition, "Kidney Now!"
 featured many musical guest stars including Clay Aiken, Elvis Costello, Mary J. Blige, Sheryl Crow, the Beastie Boys (Mike D and Ad Rock), Steve Earle, Adam Levine, Sara Bareilles, Wyclef Jean, Norah Jones, Talib Kweli, Michael McDonald, Rhett Miller, Moby, Robert Randolph, Rachael Yamagata and Cyndi Lauper, all as themselves.
Ramona L. Brooks (January 8, 1951 – June 2, 2014) was an American singer and actress.
 A member of Lady Flash, Barry Manilow's backup group, she sang on his 1975 Album "Tryin' to Get the Feeling".
 She also performed on Lizzy Mercier Descloux's 1979 album "Press Color".
 Tom Spahn was her vocal coach.
 Her 1977 solo single "Skinnydippin" hit 94 on what is now the Billboard Hot R&B/Hip-Hop Songs chart, and "I Don't Want You Back" reached 55 on the U.S. Dance Club Songs chart in 1981.
 On Broadway, she appeared with Doug Henning in "The Magic Show" at the Cort Theater, and with Billy Dee Williams in "I Have a Dream", at the Ambassador Theater in 1976.
 Her brief movie career included appearing as "Hooker #1" in the 1980 Frank Sinatra vehicle The First Deadly Sin and as "Hooker #2" in 1983's "Vigilante".
 Her brother Paul Stubblefield was the drummer for the 1970s Cleveland Jazz/Funk group Sounds of Unity and Love, her cousin is Hammond organ player Ike Stubblefield.
The Magic Show is a one-act musical with music and lyrics by Stephen Schwartz and a book by Bob Randall.
 It starred magician Doug Henning.
 Produced by Edgar Lansbury, it opened on May 28, 1974 at the Cort Theatre in Manhattan, and ran for 1,920 performances, closing on December 31, 1978.
 Henning was nominated for the Tony Award for Best Featured Actor in a Musical and director Grover Dale was nominated for the Tony Award for Best Direction of a Musical.
Lori Elberg, sometimes credited as Lori Grossman, (b. May 9, 1975) is an American film director/editor and writer.