 To capitalize on the success of _Exorcist, The (1973)_ (qv) some new footage  was shot featuring Elke Sommer and Robert Alda, as a priest, that involved  Lisas being possessed by a demon.  The original cut of  _Lisa e il diavolo (1972)_ (qv) was edited and used as flashback material to  surround the possession theme. This resulting version was released in 1975 as  "House of Exorcism."