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Veteran film actor Tully Marshall makes his final appearance in PRC's Behind Prison Walls. A reworking of a familiar theme, the story finds scheming steel tycoon James J. MacGlennon (Marshall) and his high-minded lawyer son Jonathan (Alan Baxter) simultaneously ending up behind bars. While incarcerated, Jonathan tries to mend his larcenous father's ways, thereby drawing closer to his not-so-bad dad. Together, father and son scheme to legally outwit the elder MacGlennon's unscrupulous business partners. Meanwhile, Jonathan's sweetheart Elinor Cantwell (Gertrude Michael) waits patiently on the "outside". One of the better PRC efforts of its time, Behind Prison Walls is a gentle comedy with pointed sociological undertones.