Phineas and Ferb: Mission Marvel

 will be a special Season 4 episode of Phineas and Ferb and serve as an animated crossover between Disney and Marvel that will premiere in the summer of 2013.

Spider-Man, Iron Man, Thor and Hulk enter Danville after Dr. Doofenshmirtz's latest "inator" scheme accidentally removes their powers and immobilizes them. Now it's up to Phineas and Ferb to team up with the Marvel Super Heroes to help them regain their powers and defeat Marvel Super Villains – Red Skull, Whiplash, Venom and M.O.D.O.K. – who are working together with Dr. Doofenshmirtz to use his power-draining technology to create mayhem.

Perry's entrance to his lair
None.

Background Information

 * Disney has confirmed that this will be a crossover with Marvel, as formerly happened with the online game Club Penguin.
 * It will be the show's second one-hour special, following Phineas and Ferb: Summer Belongs To You.

Continuity

 * Spider-Man - This will be his first appearance. Twice before, the character was imitated in the series canon ("Bowl-R-Ama Drama", "Phineas and Ferb Christmas Vacation!").
 * The Beak presumably appears again. ("The Beak", "Phineas and Ferb The Movie: Across the 2nd Dimension")

Allusions

 * Marvel - Marvel characters appear throughout the episode.

Cast

 * Vincent Martella as Phineas
 * Ashley Tisdale as Candace
 * Thomas Sangster as Ferb
 * Alyson Stoner as Isabella
 * Caroline Rhea as Mom
 * Dan Povenmire as Dr. Doofenshmirtz
 * Jeff "Swampy" Marsh as Major Monogram
 * Tyler Alexander Mann as Carl
 * Dee Bradley Baker as Perry
 * Bobby Gaylor as Buford Van Stomm
 * Maulik Pancholy as Baljeet
 * Kelly Hu as Stacy
 * TBA as Peter Parker/Spider-Man
 * TBA as Tony Stark/Iron Man
 * TBA as Thor
 * TBA as Bruce Banner/Hulk