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Matthew Lawrence plays an 11-year-old boy whose life is torn asunder by the divorce of his parents. John Ritter plays Lawrence's doctor father, who finds himself with only one day to make amends to his estranged son. Complicating matters are the divergent emotions of Lawrence's mother's new husband, and his father's new wife. Though the title would suggest that Ritter is forced to mature, it is in fact Lawrence who comes of age before the final fadeout. The Summer My Father Grew Up was first telecast March 3, 1991, where it lost the ratings war hands-down to a rerun of RoboCop.