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Through a computer glitch, Grady (Whitman Mayo) receives an extra Social Security check. After briefly weighing the option of returning the money, Grady opts for greed and spends his windfall. This transgression may prove to be his undoing when a government agent comes calling -- but it turns out that Lamont (Demond Wilson) is Grady's real nemesis. This is one of several Sanford and Son episodes taped while series star Redd Foxx was absent due to a contract dispute.