After a short hiatus, "Steven's Summer Adventure" will start airing on July 18, 2016, and will conclude on August 12, 2016. This is a special event that will last for four weeks. It will conclude the end of the third season.
The following titles of additional unaired episodes were at one time in August 2015 posted on Cartoon Network's website, but according to supervising director Ian Jones-Quartey, they should not be relied upon as they were not officially announced and not in the correct order. 
When Steven learns that he can possess his own creations, (the Watermelon Stevens residing in "Super Watermelon Island") in a dream, he finds that Lapis Lazuli has lost total control over Malachite at the bottom of the ocean and is now running rogue in Mask Island. The Crystal Gems leave Steven and a very concerned Peridot, who's stressing that the Cluster has begun to generate small tremors, at the barn. Steven falls asleep again and possesses another Watermelon Steven. He witnesses the Crystal Gems' transformation into Alexandrite and their battle against Malachite, but the Crystal Gems' fusion is too weak. In response, Steven gathers a Watermelon Steven army to rebel against Malachite, and can subdue her, while Alexandrite pierces her with an arrow.
Malachite unfuse into Lapis and Jasper as the gems celebrate. However, an earthquake hits the island, signaling the imminent danger that is the Cluster. The Island divides in half, and an unconscious Jasper slides into a crack in the ground. The Gems tell Steven to wake up and destroy the Cluster with Peridot and the drill since they are too far away to make it back in time. He does so in "Gem Drill", where the two activate the machine and start drilling towards the Cluster's coordinates. After another gem mutant attack, Steven realizes he does not want to hurt the Cluster or any of its Gems, but Peridot is determined to destroy it, especially once they make contact.
However, when the drill hits the Cluster, Steven starts to feel its pain. This culmination of feelings causes him to enter the Cluster's psyche. He learns that the Cluster shards do not want to form but instead want to feel whole. In response, Steven talks them into enjoying each other's company and bubbles the entire Cluster, with the help of the shards themselves. Steven and Peridot return to the surface to find the Gems with an unconscious Lapis, who wakes up in "Same Old World". Lapis realizes she has no home anymore, as she hates Earth and can't go back to Homeworld.
Steven then tries to convince her that she can stay on the Earth. With Lapis, the two fly around the world to seek a place for her, but when Lapis sees the Galaxy Warp, she becomes upset. She tells Steven the story of her abandoning on Homeworld after being mistaken for a rebel Crystal Gem and placed in a mirror to serve as a respondent. She was left and broken within the hurry of the evacuation, but Steven convinces her that she can stay on Earth and learn to love it. However, when she learns that Peridot has reformed and has decided to live in the barn too, she becomes woeful and gradually bitter toward Peridot since she and Homeworld imprisoned her years ago. In "Barn Mates", Steven helps Peridot find ways to be friends with Lapis, with many of his proposals and activities failing until Steven talks to her and reminds them of a common goal they have. A Roaming Eye suddenly appears, sent by Homeworld to capture Peridot, but Lapis destroys it to protect her, signifying she shows some concern about Peridot.
Out of the vessel come a troop of five Ruby soldiers, and, to distract them from Peridot, Garnet unfuses to allow Ruby to infiltrate the troops, and the gang ends up playing a game of baseball for the barn's ownership, pretending to be humans. However, Ruby and Sapphire, now separated, can't stop flirting and end up fusing again, giving away the Crystal Gems' disguise. To prevent damage further, Peridot throws herself into the conflict in an attempt to sacrifice herself. However, the Rubies reveal they want Jasper instead since they were the leader. Steven lies to the Rubies by claiming Jasper's current location is on the planet, Neptune, which then prompt the Rubies to fly off.
Season 2 and Season 3 were originally formatted as 52-episode seasons, however, for unknown reasons, Cartoon Network re-labelled the second half of the second season as Season 3, and then split the original third season into Season 4 and Season 5.