 It also features Barry Fitzgerald, Wilfrid Lawson, John Qualen, Mildred Natwick, and Ward Bond, among others.The film was adapted by Dudley Nichols from the plays "The Moon of the Caribbees", "In the Zone", "Bound East for Cardiff", and "The Long Voyage Home" by Eugene O'Neill.The original plays by Eugene O'Neill were written around the time of World War I and were among his earliest plays.