 When another experiment goes wrong, their father, Barry (Phillip Jarrett), forbids him from making more experiments in his lab until he learns responsibility.Willie is convinced he can defeat the aging process, and while devising an experimental anti-aging formula, he accidentally spills some on a bar of soap.When their grandmother Cat (Hope Clarke) unknowingly uses the tainted soap, she is transformed into a 17-year-old (Tamera Mowry).