Billy Dilley's Super-Duper Subterranean Summer is an American animated television series, premiered on Disney XD in June 3, 2017.[1] It is created and executive produced by Aaron Springer, an animation veteran whose extensive credits include working on Dexter's Laboratory, SpongeBob SquarePants, Samurai Jack, The Grim Adventures of Billy & Mandy, Gravity Falls, Wander Over Yonder, and the current run of Mickey Mouse shorts.[2] Springer was also behind the Adult Swim pilot Korgoth of Barbaria.

The show follows the adventures of Billy Dilley (Aaron Springer), a 7th grader who loves science, and his lab partners, Zeke (Tom Kenny) and Marsha (Catie Wayne), who on summer vacation find themselves trapped in a strange world located in the Earth's core.

The show was first announced in 2014 as a potential pilot.[3] In March 2016, it was confirmed that Disney XD has greenlit the show for a full series.[2]

In 2015, Merriwether Williams was confirmed in a Twitter post by Vincent Waller as one of the show's writers, whilst character designer Robertryan Cory announced on his Facebook page he has been working on the series for over a year before the pickup was officially sealed.


  • Jessica McKenna was originally going to voice the character Billy Dilley, but was replaced by creator Aaron Springer for unknown reasons.
  • Ashley Johnson was originally going to voice Judy, but she was replaced by Sarah-Nicole Robles also for unknown reasons.



  2. 2.0 2.1 Milligan, Mercedes (March 4, 2016). "Disney XD Announces ‘Billy Dilly’ and ‘Country Club’". Retrieved on April 30, 2016.
  3. Amidi, Amid (July 17, 2014). "Disney TV Inks Deals With Aaron Springer, Jhonen Vasquez, Jesse LeDoux, and Ryan Quincy". Retrieved on April 30, 2016.

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Billy dilley logo
Billy Dilley's Super-Duper Subterranean Summer
Billy Dilley • Zeke • Marsha • Anaximander • Count Raymond Wretcher • Judy
Season One: "Lab Friends... Forever? / Surviving Billy" • "Calzones / Crab Hands" • "The Date / The Troggies Next Door" • "The Mushroom Prince / Count Wretcher" • "Hey Judy / Welcome to the Hag House" • "Beastie Billy / Zartran" • "K is for Klutz / Tommy X" • "Billy/Willie / The Telltale Wart" • "Ol' MacBilly / Silly Spheres" • "Wretcherous Treachery / Jared" • "Sluggy / Double Bubble" • "The Glorp of the Gorks / Rat's Entertainment!" • "The Battle for Subterranea-Tania"

v - e - dDisney Television Animation series
Disney Afternoon Era: 1985–96
The WuzzlesAdventures of the Gummi BearsDuckTales (1987)The New Adventures of Winnie the PoohChip 'n Dale Rescue RangersTaleSpinDarkwing DuckGoof TroopThe Little MermaidRaw ToonageBonkersMarsupilamiAladdinGargoylesThe Shnookums and Meat Funny Cartoon ShowTimon & PumbaaQuack PackMighty Ducks
One Saturday Morning Era: 1996–2002
Jungle CubsRecessPepper AnnNightmare Ned101 Dalmatians: The SeriesHercules: The Animated SeriesMickey Mouse WorksThe WeekendersTeacher's PetBuzz Lightyear of Star CommandHouse of MouseLloyd in SpaceThe Proud FamilyThe Legend of TarzanTeamo Supremo
Playhouse Disney Era: 1998–2011
Mickey Mouse ClubhouseMy Friends Tigger & PoohSpecial Agent Oso
Disney Channel Era: 2003–present
Kim PossibleFillmore!Lilo & Stitch: The SeriesDave the BarbarianBrandy & Mr. WhiskersAmerican Dragon: Jake LongThe Buzz on MaggieThe Emperor's New SchoolThe ReplacementsElena of AvalorTangled: The SeriesBig City GreensAmphibiaThe Owl House
Jetix Era: 2004–2009
Super Robot Monkey Team Hyperforce Go!Get EdYin Yang Yo!
Disney XD Era: 2007/2009–present
Phineas and FerbKick Buttowski: Suburban DaredevilFish HooksMotorcityTron: UprisingGravity FallsRandy Cunningham: 9th Grade NinjaMickey MouseWander Over YonderThe 7DStar Wars RebelsPenn Zero: Part-Time HeroStar vs. the Forces of EvilPickle and PeanutFuture-Worm!Milo Murphy's LawBilly Dilley's Super-Duper Subterranean SummerDuckTales (2017)Big Hero 6: The SeriesSpace Chickens In Space
Disney Junior Era: 2011–present
Jake and the Never Land PiratesSofia the FirstThe Lion GuardMickey and the Roadster RacersFancy NancyMira, Royal Detective