Granny's Super Powers Are Proper Good

She'll put the world to rights, with her pants outside her tights!
When Granny finds a costume in the attic (a leotard with red metallic boots!), she vows to solve her family's problems with her newfound super-powers. But she can't even help Mother get the coffee lid off the jar, or get Auntie down from the top of the apple tree, let alone rescue Uncle from an alien invasion!
Will the whole family end up captured by little green men, or will Granny finally discover her real super-power?