Question: Margot Kidder's and Jennifer Salt's co-star in "Sisters" appeared in how many movies, television shows and plays?

Context articles: Heartaches (film)
Kam Tong
Erik van der Wurff
Bridgette Crosby
Too Much Sex
Mr. Mike's Mondo Video
Nichols (TV series)
Black Christmas (1974 film)
Charles Durning
Sisters (1973 film)

Heartaches is a 1981 comedy motion-picture written by Terence Heffman and directed by Donald Shebib.
 It stars Margot Kidder, Annie Potts, Winston Rekert and Robert Carradine.
 The movie is about a young woman, Potts, married to a stock car racer and carrying his friends' child.
 As she flees that scene, her husband (Carradine) races alongside her bus.
 On this bus, Potts' character meets the free spirited Kidder and the two women move in together planning to raise the baby.
 Dealing with romance and poverty, they learn that they have more in common than they thought.
Kam Tong (December 18, 1906 in San Francisco – November 8, 1969 in Costa Mesa, California) was a Chinese American actor best known for his role as Hey Boy on the CBS television series "Have Gun – Will Travel" and as Dr. Li in the film version of the Rodgers and Hammerstein musical "Flower Drum Song".
 Kam was also a regular on the short run CBS-TV series "Mr. Garlund" in 1960.
 He appeared in many movies, often as an uncredited Chinese, Japanese, or Filipino character.
 He appeared in many television shows including "The Man from U.N.C.L.E.", "The Big Valley", "The Time Tunnel", "The Final War of Olly Winter", and "I Spy".
Erik van der Wurff (9 July 1945 – 22 September 2014) was a Dutch pianist, composer, arranger, producer and conductor.
 He worked mainly on soundtracks and as a composer for many movies and television shows.
 He also made acting appearances in two Dutch television shows in 1977 and 1980.
 He was the regular pianist and composer on the Herman van Veen shows.
 He composed music for many theater productions, musicals, movies and for the comic series Alfred Jodokus Kwak which was aired in various countries.
Professor Bridgette Crosby is a fictional character in the DC Comics Universe , who first appeared in "Superman (vol.
 2)" #158 (July 2000).
 The character has also made appearances in the "Smallville" television series, portrayed by actress Margot Kidder.
Too Much Sex is a 2000 Canadian sex comedy film directed by Andrew Ainsworth, produced by the Canadian Film Centre and starring Michael McMurtry, Janet Kidder (niece of Margot Kidder) and Diane Flacks.
 Sky Gilbert and Christie MacFadyen (who starred in The Top of His Head) also have minor appearances.
Mr. Mike's Mondo Video is a 1979 American comedy film conceived and directed by "Saturday Night Live" writer/featured player Michael O'Donoghue.
 It is a spoof of the controversial 1962 documentary "Mondo Cane", showing people doing weird stunts.
 (The logo for "Mr. Mike's Mondo Video" copies the original "Mondo Cane" logo.)
 Many cast members of "Saturday Night Live", including Dan Aykroyd, Jane Curtin, Laraine Newman, Bill Murray, Don Novello and Gilda Radner, appear in "Mr. Mike's Mondo Video".
 People who had previously hosted "SNL", or would go on to host (such as Carrie Fisher, Margot Kidder and Teri Garr) make cameo appearances in the film.
 Others who appear in the film include musicians Sid Vicious, Paul Shaffer, Debbie Harry, Root Boy Slim, and Klaus Nomi; artist Robert Delford Brown; and model Patty Oja.
Nichols (also known as James Garner as Nichols) is an American Western television series starring James Garner broadcast in the United States on NBC during the 1971-72 season.
 Set in the fictional town of Nichols, Arizona, in 1914, "Nichols" differed from traditional Western series of the era.
 The main character, a sheriff, rode on a motorcycle and in an automobile rather than on the traditional horse.
 Nichols did not carry a firearm and was generally opposed to the use of violence to solve problems, preferring other means.
 Margot Kidder portrayed Ruth, his love interest and a barmaid at Salters.
Black Christmas (former alternate titles include Silent Night, Evil Night and Stranger in the House) is a 1974 Canadian psychological slasher film directed by Bob Clark and written by A. Roy Moore.
 It stars Olivia Hussey, Keir Dullea, Margot Kidder, Andrea Martin, Marian Waldman and John Saxon.
 The story follows a group of sorority sisters who are receiving threatening phone calls, while being stalked and murdered during the holiday season by a deranged murderer hiding in the attic of their sorority house.
Charles Edward Durning (February 28, 1923 – December 24, 2012) was an American actor, with appearances in over 200 movies, television shows and plays.
 Durning's best-known roles included "The Sting" (1973) and "Dog Day Afternoon" (1975), along with the comedies "The Best Little Whorehouse in Texas" (1982), "Tootsie" (1982), and "To Be or Not to Be" (1983).
Sisters (also known as "Blood Sisters" in the United Kingdom) is a 1973 American psychological horror film directed by Brian De Palma and starring Margot Kidder, Jennifer Salt and Charles Durning.
 The plot focuses on a French Canadian model whose separated Siamese twin is suspected of a brutal murder witnessed by a newspaper reporter in Staten Island.