^The pilot initially was aired as a stand-alone short on Nicktoons Network January 11, 2007,[1][7] before it was re-aired as part of the Nicktoons' series Random! Cartoons on December 7, 2008.[8]
^"Evergreen" first aired on November 10, 2014 on Cartoon Network in Latin America.[139] "Astral Plane" was first uploaded on December 24, 2014 onto Cartoon Network's official Brazilian website.[140] "The Visitor" first aired on February 3, 2015 on Cartoon Network in South Korea.[141] "Friends Forever" and "Jermaine" aired on Cartoon Network in Latin America on April 6, 2015 and April 13, 2015 respectively.[142] However, because this field specifically refers to domestic airdates, the information here will denote when these episodes first aired in the United States.
^The Islands miniseries was released on DVD and made available for download on iTunes and Amazon.com on January 24.[205] However, because this field specifically refers to episode airdates, the information here will denote when these eight episodes first aired on Cartoon Network.
^"Orb" was released through the Cartoon Network phone App on April 14,[228] the Elements miniseries was released for download via iTunes on April 18,[229] and "Abstract" through "Three Buckets" were released via the Cartoon Network phone app on July 14.[230] However, because this field specifically refers to episode airdates, the information here will denote when these fourteen episodes first aired on Cartoon Network.
^"Seventeen" was released on the Cartoon Network website on December 7, 2017;[242] "Ring of Fire", "Marcy & Hunson", and "The First Investigation" were released via the Cartoon Network phone app on December 8;[243] and "Blenanas", "Jake the Starchild", "Temple of Mars", and "Gumbaldia" were released via the Cartoon Network phone app and VOD on March 9.[244] However, because this field specifically refers to episode airdates, the information here will denote when this episode first aired on Cartoon Network.