Dora and Boots are playing catch when they discover a lost Baby Fox. And he wants his mommy! Just then, Swiper shows up to swipe Boots' superball. But when Swiper sees Baby Fox, he takes heart...and offers to help bring him home to his Mami! Wow! Swiper wants to help! That's so great! So off go Dora, Boots and Swiper to bring Bebé Zorrito back to his Fox Hole. With Swiper's help, they scoot past the volcano, over the Prickers and Thorns, and then find Bebé Zorrito's Mami at the Fox Hole. Swiper even learns to say "Thank you"! Wow! It's Swiper the Explorer to the rescue!

All aboard! It's time for the big train race. First train to the Big Yellow Station wins a big whistle. The little blue train, Azul, doesn't think he has a chance. So Dora and Boots climb on board and race with Azul over the Big Mountain and through the Dark Tunnel. Can they make it to the station before the other trains?

Dora and Boots are hiking on Rainbow Rock when they come across a shy rainbow, Arco Iris, hiding behind a waterfall. Just then, from high above Rainy Mountain, the Sun calls out that he needs a rainbow to shine in the sky -- and fast. But Arco Iris has never been up in the sky before where everyone else can see him. Dora and Boots assure the little rainbow that he is the most magnificent rainbow of them all. ¡Qué bello! Encouraged by their compliments, Arco Iris agrees to take the job -- his first ever. Now Dora and Boots need to help him get to Rainy Mountain so he can shine in the sky. But to get to Rainy Mountain, they have to go over the Troll Bridge and across Sneezing Snake Lake...and they better hurry! Will you help Arco Iris get to Rainy Mountain so he can shine in the sky?