The Phineas and Ferb "Whatcha Doin'? marathon is the name given to the Phineas and Ferb marathon that was aired on Disney Channel US between 1:30 p.m. and 11:00 p.m. on December 26, 2008. The theme for the marathon centers around Isabella and her innocent question of "Whatcha doin'?" On the same day, Disney Channel UK broadcasted a Phineas and Ferb marathon from 6 a.m. to midnight, with a break from 8 p.m. to 9:30 p.m. to show the movie "You Wish". It is not known if Disney Channel UK also called their marathon "Whatcha Doin'?"