Terror in the Sky is a low budget 1971 television film remake of 1957's Zero Hour!, which itself was based on the 1956 television play Flight into Danger. Arthur Hailey recycled the premise in his book Runway Zero-Eight which was co-written with John Castle in 1958. The film stars Doug McClure, Lois Nettleton, Roddy McDowall, Leif Erickson, Kenneth Tobey, and Keenan Wynn.