Dianetics is a set of pseudoscientific ideas and practices regarding the metaphysical relationship between the mind and body that was invented by L. Ron Hubbard and is practiced by followers of Scientology. Hubbard coined Dianetics from the Greek stems dia, meaning through, and nous, meaning mind.

Dianetics explores the existence of a mind with three parts: the conscious "analytical mind," the subconscious "reactive mind", and the somatic mind. The goal of Dianetics is to remove the "reactive mind", which Scientologists believe prevents people from becoming more ethical, more aware, happier and saner. The Dianetics procedure to achieve this is called "auditing". Auditing is a process whereby a series of questions are asked by the Scientology auditor, in an attempt to rid the auditee of the painful experiences of the past which scientologists believe to be the cause of the "reactive mind".

Dianetics grew out of Hubbard's personal experiences and experiments and has been described as a mix of "Western technology and Oriental philosophy". Hubbard stated that Dianetics "forms a bridge between" cybernetics and General Semantics, a set of ideas about education originated by Alfred Korzybski that was receiving much attention in the science fiction world in the 1940s. Hubbard claimed that Dianetics can increase intelligence, eliminate unwanted emotions and alleviate a wide range of illnesses he believed to be psychosomatic. Among the conditions purportedly treated against are arthritis, allergies, asthma, some coronary difficulties, eye trouble, ulcers, migraine headaches, sex deviations and even death. Hubbard variously defined Dianetics as "a spiritual healing technology" and "an organized science of thought."

Thomas Cruise Mapother IV ( /ˈtɒməs ˈkruːz ˈmeɪpɒθər/; born July 3, 1962), widely known as Tom Cruise, is an American film actor and producer. He has been nominated for three Academy Awards and has won three Golden Globe Awards for the same movies: Born on the Fourth of July (1989), Jerry Maguire (1996), Magnolia (1999). He started his career with the movie Endless Love. Cruise's first appearance in a major film was in 1981's Taps. His first leading role was in the film Risky Business, released in August 1983. Cruise played the role of a heroic naval pilot in the popular and successful 1986 film Top Gun, and also secret agent Ethan Hunt in the series of Mission: Impossible action films.

He has starred in a variety of other successful films, including: Rain Man (1988), Days of Thunder (1990), A Few Good Men (1992), Vanilla Sky (2001), Minority Report (2002), The Last Samurai (2003), Collateral (2004), and War of the Worlds (2005).

Since 2005, Cruise and Paula Wagner have been in charge of the United Artists film studio, with Cruise as producer and star and Wagner as the chief executive. Cruise is also known for his support of and adherence to the Church of Scientology.

Lafayette Ronald Hubbard (March 13, 1911 – January 24, 1986), better known as L. Ron Hubbard (and often referred to by his initials, LRH or as Elron), was an American pulp fiction author and the founder of the Church of Scientology. After establishing a career as a writer, becoming best known for his science fiction and fantasy stories, he developed a self-help system called Dianetics which was first published in May 1950. He subsequently developed his ideas into a wide-ranging set of doctrines and rituals as part of a new religious movement that he called Scientology. His writings became the guiding texts for the Church of Scientology and a number of affiliated organizations that address such diverse topics as business administration, literacy and drug rehabilitation.