When an attack on the O.W.C.A. incapacitates the animal agents, only Agent P and his animal trainees can save the day. Carl and Monogram fend for themselves.
| Actor | Role |
|---|---|
 Thomas Brodie-SangsterFerb (voice) | Ferb (voice) |
 Vincent MartellaPhineas (voice) | Phineas (voice) |
 Dan PovenmireDr. Doofenshmirtz / Additional Voices (voice) | Dr. Doofenshmirtz / Additional Voices (voice) |
 Jeff 'Swampy' MarshMajor Monogram / Additional Voices (voice) | Major Monogram / Additional Voices (voice) |
 Dee Bradley BakerPerry / Additional Voices (voice) | Perry / Additional Voices (voice) |
 Jane KaczmarekMaggie the Macaw (voice) | Maggie the Macaw (voice) |
 J.K. SimmonsNapoleon / Additional Voices (voice) | Napoleon / Additional Voices (voice) |
 Josh GadWendell (voice) | Wendell (voice) |
 Paul ReubensParenthesis (voice) | Parenthesis (voice) |
 Stephen RootFloyd / Additional Voices (voice) | Floyd / Additional Voices (voice) |
 Tyler Alexander MannCarl (voice) | Carl (voice) |