The company Happy App and a new hero arrive in town. Later, Mateo helps Sneak get rid of a creepy cake in the Grim Realm.

After a fight about the Dream Smasher, Z-Blob and Mateo each try to find new friends in the Dream World and Waking World.

Zoey and Mateo race to decide who's the fastest delivery rider only to realize their old Dream World enemy, Claudius, works at Happy App.

Dream Smasher's popularity continues to grow, and Izzie tries to join his team as a sidekick — leaving Mateo and the Dream Chasers behind.

After a dangerous night in the Dream World, Mateo and Zoey go to find Claudius at Happy App HQ and learn he's been promoted.

Stranded and separated in a dangerous dream space, the gang must find a way to wake up. Meanwhile, Dr. Oswald confronts an old friend.

In the Waking World, Mateo, Izzie and the Dream Chasers rush to learn about the origins of Lunia's amazing powers.

Mateo and Izzie try to trick Claudius into spilling the details of his plan while Happy App takes over the school.

Dr. Oswald and the team devise a plan to get inside the Dream Smasher's hideout, which he believes is inside the Dream World's mysterious new sun.

Stuck in Dream Smasher's brain base, Mateo and Z-Blob bust out of prison to track down their pals and the hourglass before it's too late.