Terror in the Sky is a 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.