Grandpa arranges for Tilda Hicks from Smokey Corners to join the McCoy family as housekeeper, and she immediately sets her cap for widower Luke McCoy. The arrangement proves highly successful until Tilda attends the neighborhood dance with Luke and scores an immediate hit with the local masculine populace.

George MacMichael's big moment during his election as commander of the local VFW post is shattered when Grandpa brings to the ceremonies three of George's buddies who know the real story of his ""heroic"" battlefield actions.

Grandpa becomes involved with diplomatic relations and the U.S. State Department when a foreign nation's farm tour visits neighbor George's ranch and Grandpa pursuades the group to detour by the McCoy farm. At first it appears Grandpa has committed a colossal faux pas, but his apparent blundering develops unexpected consequences.

Little Greg leaves home when his widowed mom decides to remarry. Greg: Butch Patrick. Luke: Richard Crenna. Louise: Janet De Gore.

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Luke and Louise feel they have a real problem with Greg, who is addicted to telling fantastic stories about imaginable playmates and people. When they return home from a day's outing, after leaving Greg with Pepino, he tells them three escaped convicts had been captured by the police at their home, and they decide it is just another one of his tall tales.