Homer finds out that Grampa was once a famous wrestler on The Simpsons. "Gorgeous Grampa" is the 14th episode of the show's 24th season.
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It's that special time of the year on The Simpsons. Look for the family to see its future on the episode "Holidays of Future Passed."
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A picture of Abe Simpson, aka Grandpa Simpson, Homer's rambling, senile father on The Simpsons.
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The Simpsons Quotes

Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side!
Man: (From inside a bathroom stall.) That's a right triangle, you idiot!
Homer: D'oh!

Mayor Quimby: And, uh, may the Force be with you.
Leonard Nimoy: You have no idea who I am, do you?
Mayor Quimby: Sure, I do. You're one of the Little Rascals, right?