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Dick Van Dyke plays a dual role as Rob Petrie and Rob's late Uncle Hezekiah, who appears in this episode via a filmed "living will." As one the main heirs to the curmudgeonly Hezekiah Petrie's vast fortune, Rob is a bit confused by the old man's capricious legacy -- which consists of an ancient roll-top desk, a cryptic poem, and a snatch of the old song "Me and My Shadow." Ultimately, Rob and Laura (Mary Tyler Moore) plunder the contents of the desk, but find absolutely nothing of interest -- except for a yellowed old photograph....