The plane is a flight from New York to London piloted by Captain Larkin (Robert Stack). When the plane is already en route NY airport security chief Robert Davenport (George Maharis) received a letter warning him that murders will take place on Flight 502...
Luckily there is a police officer Detective Myerson (Hugh O'Brian) is aboard and begins to look for the possible murderer with the help of the captain and Davenport. There are a number of suspects but the captain and the chief flight attendant (Farrah Fawcett) try and keep everything under control but when the murders finally begin things quickly unravel...
Nothing about this film is that original at all but the cast ensemble is good and they make the most of what is a fairly low budget film. The film has some good twists and certainly is entertaining enough though might be a bit of a struggle on the long-haul.
