Exorcism
In Catholic Christianity, exorcisms are performed in the name of Jesus Christ. A distinction is made between a formal exorcism, which can only be conducted by a priest during a baptism or with the permission of a bishop, and "prayers of deliverance" which can be said by anyone.
The Catholic rite for a formal exorcism, called a "Major Exorcism", is given in Section 11 of the Rituale Romanum. The Ritual lists guidelines for conducting an exorcism, and for determining when a formal exorcism is required. Priests are instructed to carefully determine that the nature of the affliction is not actually a psychological or physical illness before proceeding.
Repossessed (film)
After a visit to the hospital, and a visit from Father Luke Brophy (Starke), Brophy concludes that Nancy is indeed possessed. Mayii, however, refuses to perform the exorcism, claiming he is too weak, and that both he and Nancy barely survived her previous exorcism. Brophy then visits the Supreme Council for Exorcism Granting. Ernest and Fanny (Ned Beatty and Lana Schwab) of "The Ernest and Fanny Miracle Hour" are also present. Ernest concludes that an exorcism is warranted, and convinces the Council to televise Nancy's exorcism. They agree, believing it will convert millions, so Ernest presents "Ernest and Fanny's Exorcism Tonight" to the network.