O Lucky Man!
 is a 1973 British comedy-drama fantasy film, intended as an allegory on life in a capitalist society.
 Directed by Lindsay Anderson, it stars Malcolm McDowell as Mick Travis, whom McDowell had first played as a disaffected public schoolboy in his first film performance in Anderson's film "if..." (1968).
 The film was entered into the 1973 Cannes Film Festival.
Rachael Kozak (born May 26, 1976), better known by her stage name Hecate, is an American-Austrian experimental industrial and breakcore musician based in Berlin, Germany.
 Her stage name originates from Hecate, the Greek goddess of sorcery.
 Kozak uses sexuality as a major topic in her music (such as in the tracks "Hecate Jacks Off The Jackal" and "The Magick Of Female Ejaculation"), and has a heavy focus on death and the occult.
 With over thirty releases, she has become a notable producer in the harsher genres of electronic music.
 Kozak is also known for her collaborations with prolific electronic artist Venetian Snares (Aaron Funk), creating the album "Nymphomatriarch" entirely from recordings of she and Funk having sex, during a two-week tour in 2003.
 She is also involved with video production, graphic arts and writing.
 Since 1996, Kozak has managed her own record label Zhark International, has traveled the world extensively to perform, and became involved in the extreme metal scene, particularly industrial black metal.
 She eventually formed Treachery, a black metal group.
Aaron Kozak (born August 23, 1983) is an American playwright and filmmaker.
The White Bus is a 1967 short film by British director Lindsay Anderson.
 The screenplay was jointly adapted with Shelagh Delaney from a short story in her collection "Sweetly Sings the Donkey" (1963).
Lindsay Gordon Anderson (17 April 1923 – 30 August 1994) was a British feature film, theatre and documentary director, film critic, and leading light of the Free Cinema movement and the British New Wave.
 He is most widely remembered for his 1968 film "if...", which won the "Palme d'Or" at Cannes Film Festival and was Malcolm McDowell's cinematic debut.
 He is also notable, though not a professional actor, for playing a minor role in the Academy Award winning film "Chariots of Fire".
 Malcolm McDowell produced a 2007 documentary about his experiences with Lindsay Anderson, "Never Apologize".
The Long and the Short and the Tall is a play written by British playwright Willis Hall.
 Set in the Second World War, the play premiered at the Royal Court Theatre in London in January 1959; it was directed by Lindsay Anderson and starred Peter O'Toole and Robert Shaw.
 It was Anderson's first major production for the Royal Court, transferring to London's West End in April 1959.
Thursday's Children is a 1954 British short documentary film directed by Lindsay Anderson about The Royal School for the Deaf in Margate, Kent, UK.
 The film is nearly silent, apart from music and narration.
 It focuses on the faces and gestures of the little boys and girls.
 As a residential school teaching lip reading, rather than a sign language, it features methods and goals not now used, and notes that only one child in three will achieve true speech.
 Filmmakers Lindsay Anderson and Guy Brenton were unable to gain distribution for the film until it won an Academy Award in 1955 for Documentary Short Subject.
The Changing Room is a 1971 play by David Storey, set in a men's changing room before, during and after a rugby league football game.
 It premiered at the Royal Court Theatre on 9 November 1971, directed by Lindsay Anderson.
 The 1973 Broadway production, directed by Michael Rudman, won several awards including the New York Drama Critics' Circle award for Best Play and the Tony Award for Best Featured Actor for John Lithgow.
Free Cinema was a documentary film movement that emerged in the United Kingdom in the mid-1950s.
 The term referred to an absence of propagandised intent or deliberate box office appeal.
 Co-founded by Lindsay Anderson, though he later disdained the 'movement' tag, with Karel Reisz, Tony Richardson and Lorenza Mazzetti.
 The movement began with a programme of three short films at the National Film Theatre, London, on 5 February 1956.
 The programme was such a success that five more programmes appeared under the Free Cinema banner before the founders decided to end the series.
 The last event was held in March 1959.
 Three of the screenings consisted of work from overseas film makers.
In Celebration is a 1975 film directed by Lindsay Anderson.
 It is based in the 1969 stage production of the same name by David Storey which was also directed by Anderson.
 The movie was produced and released as part of the American Film Theatre, which adapted theatrical works for a subscription-driven cinema series.
 It was meant to be shown theatrically with tickets sold in advance.

Question: What do Lindsay Anderson and Aaron Kozak have in common?
Answer: filmmaker