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Heinz Doofenshmirtz sometimes tells backstories about his childhood or recent events that have...
Dr. Heinz Doofenshmirtz, (Dr. D, Dr. Doofenshmirtz, Doofenshmirtz, or Doof for short), is a 47...
Phineas and Ferb help their grandfather relive his glory days as a daredevil. Dr. Doofenshmirtz...