 An architect and his wife are flying from London to L.A. with an altar from an ancient abbey secured in the plane s cargo hold. Also aboard the flight are Buddy Ebsen as an pushy millionaire, William Shatner as a drunken, cynical ex-priest, Tammy Grimes as a nutcase, and Chuck Connors as the lantern-jawed pilot. Crew and passengers come into jeopardy when an invisible demon escapes from the altar, and threatens the plane in an effort to destroy the architect s wife. No, it doesn t make any sense, but it s pretty hilarious, and you should watch it anyway.