'Dad' Knowland
"Dad" Knowland was the old man at the shipyard where they repaired the PT boat.
He is played by Russell Simpson. When everyone was leaving, "Dad" said he'd been there too long to leave and he'd stay and fight the Japs. As the rest leave, "Dad" sits with his rifle and "Red River Valley" plays softly. Russell Simpson also played Pa Joad in "The Grapes of Wrath" (another John Ford movie) and Red River Valley was notable in that film.