My Secret Agent 3

Perry encounters Liam again and this time, Liam teams up with Mega Man killer#2: Punk. They kidnap Doofenshmirtz, Lyla and Mega Man and has hid them in the one place that Agent P will never find them: The Flynn-Fletcher house! Also, Phineas, Ferb and the gang discover that Perry is a secret agent and must team up with him to rescue Doofenshmirtz, Lyla and Mega Man and defeat Liam and Punk.

Summary
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Transcript
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