The show features eight-year-old Diego (voiced by Jake T. Austin, seasons 1–3; Matt Hunter, season 4; Brandon Zambrano, season 5) who rescues animals around the world. His cousin is Dora (Kathleen Herles) from "Dora the Explorer", as revealed in multiple shows, usually without Boots by her side. Diego was first introduced in an episode of "Dora the Explorer" entitled "Meet Diego!" (originally voiced by brothers Andres and Felipe Dieppa). Diego has a jaguar companion named Baby Jaguar (voiced by Thomas Sharkey) who assists him in rescuing the animals. Baby Jaguar also appears in "Dora the Explorer" along with Diego, but inconsistently; on "Go, Diego, Go!" he takes on a more active role, and is able to speak.