Exorcism
In Catholic practice the person performing the exorcism, known as an exorcist, is an ordained priest. The exorcist recites prayers according to the rubrics of the rite, and may make use of religious materials such as icons and sacramentals. The exorcist invokes God—specifically the Name of Jesus—as well as members of the Church Triumphant and the Archangel Michael to intervene with the exorcism. According to Catholic understanding, several weekly exorcisms over many years are sometimes required to expel a deeply entrenched demon.
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.