Invasion of the Evil Platypus Clones

 is a Phineas and Ferb episode that will premiere October 2013.

Background Information

 * Second use of the "Invasion of the..." in an episode title ("Invasion of the Ferb Snatchers").
 * Second time platypus clones will be seen. ("Cheer Up Candace").

Production Information

 * On July 31, 2012, Aliki Theofilopoulos Grafft confirmed on her Twitter account that she had started work on a Halloween episode. Click here to see the info.
 * A book based on the episode will come out July 23, 2013.