 "Dad" Knowlton, the shipwright who repairs the PT boats, has a  poignant little scene in which he refuses to leave the place hes  lived and worked for forty years, although the Japanese are  advancing. Rusty Ryan, John Waynes character, finally leaves Dad  sitting alone on his porch with a rifle in his hands and a jug of  moonshine between his knees, as "Red River Valley" plays in the  background. How eerily reminiscent of "The Grapes of Wrath," which  is particularly appropriate because Dad is played by Russell  Simpson, whom John Ford directed as Pa Joad in 1940.