"Save the Worlds" is the fourth double-length special episode, the thirty-eighth episode of the first season, and the first season finale of Penn Zero: Part-Time Hero. It premiered on October 1, 2015.
When Phyllis’ Multi-Universe Transprojector (MUT) is damaged and dangerous vortexes open up throughout the multiverse, Penn and team begin an epic journey through every world visited to close the vortexes before it’s too late.
This is the fourth and final "tent pole" of four important double-length episodes that "dig a bit deeper and tell a bigger story," of the first season, the previous three being "North Pole Down", "The Ripple Effect", and "Zap One".
This episode shows the most worlds in one episode.
This episode also showcases many characters from different dimensions at the same time.
Penn finds a crystal while in the Nothingness, which Phyllis reveals is a key in finding Penn's parents.
Penn Zero: Part-Time Hero (Opening Theme) • We're Breaking Out of Here for Christmas • Time to Kill • We Can Catch the Milkman • What is a Princess? • Pigoilet • Victory is Mine at Last • The Truth of It Is • Moonlight Bright • This is a Real Song • Boone Reads On • Race to the Top • Race to the Top (reprise) • You're a Karaoke King • High in the Sky • Breath In, Breath Out • Bad Weed • Today is the Day • My Name is Penn Zero • Save the Worlds • In the Splishy Splashy Sea • Come Aboard with Me • Training to Win • Wings of Destiny Song • Sometimes We Need a Friend • Build and Backup Now • The Time Table • Everybody Chillax • Why Won't You Turn Green • It's the Best Friend Song • It's the Best Friend Make Up Song • Grinkon's Song
Middleburg • Middleburg Central High • The Odyssey • Fish Stick on a Stick • North Pole • Knight World • Superhero World • Arabian World • Plush Toy World • Clown World • Dinosaur Cowboy World • Cereal World • Old English World • Giant Monster World • Zombie World • Space World • Ocean World • Color World • Musical Fairy Tale World • Caveman Spy World • Future Barbarian World • Ultrahyperball World • Demon World • Alien World • Galaxy World • Temple World • Dragon World • Gothic Mystery World • Plant World • Animal Barbarian World • Toy World • Outer Space Court World • Robot World • Pirate World • Fairymania World • Steampunk World • Ball World • Ghost World • Rock, Paper, Scissor World • Beast World • Anime World • Sitcom World • Nothingness • Most Dangerous World Imaginable • Least Dangerous World Imaginable
Multi-Universe Hologram Uplink • Multi-Universe Transprojector • Pigoilet • The QPC Unit • Vortex Tops • Specs