It's Daniel Radcliffe on The Simpsons! Yes, Harry Potter himself lends his voice to "Diggs."
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Bart befriends a new student interested in falconery on The Simpsons. "Diggs" is the 13th episode of the show's 25th season.
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Sideshow Bob shows up again, this time as a top scientist on The Simpsons. "The Man Who Grew Too Much" is the 12th episode of the show's 25th season.
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Did Principal Skinner make a mistake when he offered his prized student a ride on a submarine. "Yellow Subterfuge" is the seventh episode of the show's 25th season.
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The family attends a funeral when someone in Springfield dies on The Simpsons. "Four Regrettings and a Funeral" is the third episode of the show's 25th season.
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A decapitated Bart has his head put on Lisa's body on The Simpsons. "Treehouse of Horror XXIV" is the second episode of the show's 25th season.
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Bart needs Lisa's help to defend himself on The Simpsons. "Dark Night Court" is the 16th episode of the show's 24th season.
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Millhouse has a whole new look after a shaving experiment goes awry on The Simpsons. "Hardly Kirk-ing" is the 13th episode of the show's 24th season.
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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?