Exorcism
In Christianity, exorcism is the practice of casting out demons. In Christian practice the person performing the exorcism, known as an exorcist, is often a member of the Christian Church, or an individual thought to be graced with special powers or skills. The exorcist may use prayers and religious material, such as set formulas, gestures, symbols, icons, amulets, etc. The exorcist often invokes God, Jesus and/or several different angels and archangels to intervene with the exorcism. Protestant Christian exorcists most commonly believe the authority given to them by the Father, Son, and Holy Spirit (the Trinity) is the source of their ability to cast out demons.
Thomas Bermingham (priest)
"The Exorcist" is a 1973 supernatural horror film by William Peter Blatty, based on the true story of Roland Doe, a 1949 case in which Catholic priests performed a series of exorcisms on a 14-year-old boy in Maryland.