Dan Povenmire and Jeff "Swampy" Marsh stop by Mashable's Say More couch. Looking at the unbridled success of Phineas and Ferb, it's hard to imagine a time when creators Dan Povenmire and Jeff ...

Looking at the unbridled success of Phineas and Ferb, it's hard to imagine a time when creators Dan Povenmire and Jeff "Swampy" Marsh had to battle for its existence and integrity.

For more on Phineas and Ferb from Povenmire and Marsh, check out Say More 's full interview on YouTube. How to watch: Phineas and Ferb Season 5 is now streaming on Disney+.

Have you ever wondered why there are *104* days of summer vacation? "Phineas and Ferb" creators Dan Povenmire and Jeff "Swampy" Marsh reveal the answer.

'Phineas and Ferb' creators explain why there are '104' days of summer vacation Dan Povenmire and Jeff "Swampy" Marsh reveal the history behind the iconic line from the theme song.

Phineas and Ferb is officially returning to the Disney Channel after wrapping its fourth season in 2015. The revival has been greenlit for 40 episodes, split into two seasons. Vincent Martella ...

Creators Dan Povenmire and Jeff “Swampy” Marsh discuss Doofenshmirtz and Candace going to the same therapist and the return of Meap the alien.

After 10 years, Phineas & Ferb has returned with most of the original voice cast. Here's how to watch the new season.

"Phineas and Ferb" stars and creators tell TheWrap about bringing the gang back together for new episodes after 10 years ...

Phineas and Ferb creators Dan Povenmire and Jeff “Swampy” Marsh opened up about how they come up with those 'Inators' inventions.

Season 5 of "Phineas and Ferb" premieres on Disney Channel tonight and will be available on Disney+ tomorrow. Here's how to watch it for free.