Billy Dilley's Super-Duper Subterranean Summer

TV review by
Emily Ashby, Common Sense Media
Billy Dilley's Super-Duper Subterranean Summer TV Poster Image
Bizarre characters, wacky humor in underground adventures.

Parents say

age 2+
Based on 2 reviews

Kids say

age 6+
Based on 4 reviews

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A lot or a little?

The parents' guide to what's in this TV show.

Educational Value

The show intends to entertain rather than to educate.

Positive Messages

Billy's subterranean world is a place devoid of adults and full of bizarre creatures and unpredictable situations. There's little reality to the nonsensical stories, but they're imaginative and humorous in ways kids will enjoy. Bathroom humor is common, including burps, snot, drool, and some scenes of characters in their underwear.

Positive Role Models & Representations

Billy Dilley and his friends are excitable, inventive, and optimistic, but they don't always make great decisions given their options. Even so, things generally work out for them, and everyone emerges from the scenarios unscathed.

Violence & Scariness

Some cartoon-style injuries (a man is shown with multiple arrows protruding from his back, for instance) and a few brief scares, but nothing serious.

Sexy Stuff
Drinking, Drugs & Smoking

What parents need to know

Parents need to know that Billy Dilley's Super-Duper Subterranean Summer is a fast-paced animated series about three friends who discover an underground world inhabited by strange creatures and eccentric humans. It's imaginative and visually engaging, thanks to the animation style and colorful characters, but there's little substance to the bizarre plots. Expect some potty humor (body noises, nasal discharge, and drooling, for instance), a lot of dramatics from the female character especially, and some moments of mild peril. Billy's interest in science stands out in some of the stories, inspiring his inventions and creative problem-solving skills, but it's not going to teach kids much about the subjects.

User Reviews

  • Parents say
  • Kids say
Adult Written byKanemori July 1, 2017


I think the premise of this show largely killed it. The main characters are at the center of the earth and you have the good old rule of three at work, but I... Continue reading
Adult Written byRj K. June 15, 2017


I hate it it' always messes up other programs for my child and she cries when this ABOMINATION comes on the screen and it's super annoying Billy Dille... Continue reading
Teen, 14 years old Written byDudulino01 May 30, 2020


When i saw Billy Dilley for the first time back in 2018 I legitimately thought it was some kind of French-Belgian cartoon because the characters looks like it g... Continue reading
Teen, 15 years old Written byJordan423 March 21, 2020

I love it

Its funny and stupid me and my brother love it

What's the story?

Best friends Billy Dilley (voiced by Aaron Springer), Marsha (Catherine Wayne), and Zeke (Tom Kenny) have an unexpectedly adventurous summer when they find themselves stranded in an underground world in BILLY DILLEY'S SUPER-DUPER SUBTERRANEAN SUMMER. It's a land of rock people, furry round monsters, and bizarre humans with odd backstories, and it's a place where just about anything can (and will) happen. For science fan Billy, this means lots of opportunities to invent solutions to his many zany predicaments.

Is it any good?

With adventure around every corner, this new world of Billy's appeals to kids' sense of imagination, even if it does so with more nonsense than anything else. The show is visually pleasing, boasts a talented voice cast, and is filled with nonstop action and laughs plus a fair dose of the bathroom humor that's such a hit with grade schoolers (if not so much their parents). What grown-ups will like are Billy's unfailing optimism and unwillingness to shirk a challenge of any size or shape.

Though only slightly prominent in the plot, Billy's fascination with science does cast a positive light on basic concepts such as inventing as they relate to the stories. There's no attempt to teach anything tangible or present Billy's creative problem-solving tactics in any realistic manner, but the fact that he's interested in designing machines and using science in other practical ways could be a positive influence on viewers.

Talk to your kids about ...

  • Families can talk about visiting new places. Do your kids enjoy new adventures, or are there some worries that accompany them? How are we influenced by where we live and the people around us? Does Billy Dilley's Super-Duper Subterranean Summer make you want to visit a new place?

  • Kids: Do you like this show's frantic pace and odd characters? Are any characters positive role models? What are the benefits of having an active imagination? How do you express your creativity?

  • What scientific topics most interest you? How does science improve our health? Our ability to communicate? Our lifestyles?

TV details

Our editors recommend

For kids who love quirky comedies

Themes & Topics

Browse titles with similar subject matter.

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