Phineas and Ferb What Do It Do?/Atlantis (2007–2015) Online
- Original Title :
- What Do It Do?/Atlantis
- Genre :
- TV Episode / Animation / Action / Comedy / Family / Musical / Sci-Fi
- Year :
- 2007–2015
- Directror :
- Jay Lender,Zac Moncrief
- Cast :
- Vincent Martella,Thomas Brodie-Sangster,Ashley Tisdale
- Writer :
- Dan Povenmire,Jeff 'Swampy' Marsh
- Type :
- TV Episode
- Time :
- 23min
- Rating :
- 7.8/10
After one of Dr. Doofenshmirtz's inventions lands in the yard, the boys try to find out what it does through reverse engineering. / Phineas and Ferb and the neighborhood kids to on an epic journey to find the lost city of Atlantis.
| Episode credited cast: | |||
 | Vincent Martella | - | Phineas Flynn (voice) |
 | Thomas Brodie-Sangster | - | Ferb Fletcher (voice) (as Thomas Sangster) |
 | Ashley Tisdale | - | Candace Flynn (voice) |
 | Caroline Rhea | - | Linda Flynn-Fletcher (voice) |
 | Richard O'Brien | - | Lawrence Fletcher (voice) |
| Rest of cast listed alphabetically: | |||
 | Dee Bradley Baker | - | Perry the Platypus (voice) |
 | Laura Dickinson | - | Additional Voices |
 | Flavia Fontenelle | - | Candace (voice) (as Flavia Fontenele) |
| Bobby Gaylor | - | Buford Van Stomm (voice) |
 | Kelly Hu | - | Stacy Hirano (voice) |
 | Tyler Alexander Mann | - | Karl (voice) (as Tyler Mann) |
 | Jeff 'Swampy' Marsh | - | Major Francis Monogram (voice) |
 | Jack McBrayer | - | Irving DuBois (voice) |
 | Mitchel Musso | - | Jeremy Johnson (voice) |
 | Maulik Pancholy | - | Baljeet Tjinder (voice) |