[s4e18] Candace-cabra Here

In the Season 4 Phineas and Ferb episode "La Candace-Cabra," the boys travel to New Mexico to find the Chupacabra, while Candace attempts to bust them [1]. The episode, which originally aired on July 12, 2013, features a twist revealing the creature is an O.W.C.A. agent [1]. Pairings include Dr. Doofenshmirtz’s hair-swapping scheme and a subplot regarding Isabella’s birthday [2].