TV-14Tokyo MX5.9(11)

Deep Insanity: The Lost Child

Name: Deep Insanity: The Lost Child
Director: Shin Oonuma
Genre: Animation, Sci-Fi & Fantasy, Action & Adventure
Released: 2021-10-13
Rating: 5.9

ディープインサニティザ・ロストチャイルド

AnimationSci-Fi & FantasyAction & Adventure

Watch Free

We checked 8 streaming services in India on 04 Jun 2026 at 12:09 IST

2021

1 Season

12 Episodes

Ended

TV-14

About

Madness and unawakening sleep, Randolph syndrome. This new illness is slowly but steadily approaching humanity, caused by the huge underground world Asylum that appeared in Antarctica. There are strange creatures different from the earth, and unknown resources. People bet their lives on the depths of the mysterious new world to get huge wealth, organizational plots, or their own ambitions. And here alone, a young man with a wish in his heart is trying to challenge the front line of Asylum.

#supernatural creature#anime#rare disease

Cast

Hiro Shimono

as Daniel Kai Shigure (voice)

Ami Koshimizu

as Vera Rustamova (voice)

Kohsuke Toriumi

as Leslie Blanc (voice)

Yuya Hirose

as Lawrence Larry Jackson (voice)

Ruriko Noguchi

as Reika Kobato (voice)

Kaede Hondo

as Sumire Motiki (voice)

Takako Tanaka

as EL-Cee (voice)

Seasons

Season 1

12 episodes2021

Episodes

Season 1

See all 12episodes →

take 01

Oct 13, 202124m

A strange disease is linked to a mysterious hole that leads to an underground world: the Asylum. "Sleepers" come to this world to fight strange monsters and retrieve unknown resources. Now, a young man who dreams of being a hero has arrived at the Asylum.

take 02

Oct 20, 202124m

As Shigure begins to settle into his new life as a Sleeper, he begins to wonder what he is good at and what he can accomplish at the Asylum.

take 03

Oct 27, 202124m

Larry goes on a dangerous and illegal mission deep in the Asylum and forces Shigure to go with him.

take 04

Nov 3, 202124m

Shigure delves into XO Leslie's past when a mysterious assailant suddenly ambushes him.

take 05

Nov 10, 202124m

Shigure is always embarrassed around Kobato and the rest of the team thinks he might have a crush on her. They hatch a plan to bring them together, but...

take 06

Nov 17, 202124m

The day of the plan has arrived and the team heads towards the Asylum. But when Hayden shows up during the mission, things go terribly wrong.

take 07

Nov 24, 202124m

With Leslie's death, the team is forced to find its way alone. And Shigure starts to have doubts about his mission...

take 08

Dec 1, 202124m

With strong pressure from the command hierarchy, Vera decides to lead a mission to the Asylum on her own.

Where does Deep Insanity: The Lost Child rank today?

Deep Insanity: The Lost Child is #1611 on the CineFlixo Daily Streaming Charts today.

Highest: #1611
Top 10: 0 days
Top 100: 0 days

Watch Deep Insanity: The Lost Child Online Free — All Episodes in HD

Looking for a place to watch Deep Insanity: The Lost Child online for free? You've landed on the right page. Deep Insanity: The Lost Child is a talked-about Japonés animation, sci-fi & fantasy, and action & adventure series from 2021 that you can stream right now on CineFlixo in high quality, no signup required.

About Deep Insanity: The Lost Child

Deep Insanity: The Lost Child Cast and Characters

The cast features Hiro Shimono (as Daniel Kai Shigure (voice)), Ami Koshimizu (as Vera Rustamova (voice)), Kohsuke Toriumi (as Leslie Blanc (voice)), Yuya Hirose (as Lawrence Larry Jackson (voice)), and Ruriko Noguchi (as Reika Kobato (voice)). Their performances are a major reason Deep Insanity: The Lost Child has built such a passionate audience.

Where to Watch Deep Insanity: The Lost Child Online

CineFlixo lets you stream Deep Insanity: The Lost Child online free, instantly, in HD. There's nothing to install — open the page, hit play, done. Works perfectly on Jio, Airtel, Vi networks across India and on slow mobile data thanks to our adaptive video pipeline.

▶ Watch Deep Insanity: The Lost Child Now

Why People Are Watching Deep Insanity: The Lost Child

Deep Insanity: The Lost Child flies under the radar but it deserves your attention. What makes it work is action sequences that don't feel cheap and world-building that respects the audience's intelligence. If you enjoy Japonés storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.

Frequently Asked Questions about Deep Insanity: The Lost Child

Where can I watch Deep Insanity: The Lost Child online for free?

You can watch Deep Insanity: The Lost Child online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.

How many episodes does Deep Insanity: The Lost Child have?

Deep Insanity: The Lost Child has 12 episodes across 1 season. All episodes are available to stream right here on CineFlixo.

Is Deep Insanity: The Lost Child good? What's the rating?

Deep Insanity: The Lost Child holds a 5.9/10 rating based on 11 reviews — a niche pick worth checking out.

Who is in the cast of Deep Insanity: The Lost Child?

The main cast includes Hiro Shimono, Ami Koshimizu, Kohsuke Toriumi, and Yuya Hirose, plus a strong supporting ensemble.

Is Deep Insanity: The Lost Child available in Japonés?

Yes — Deep Insanity: The Lost Child was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.

When was Deep Insanity: The Lost Child released?

Deep Insanity: The Lost Child first aired in 2021.

Do I need an account to watch Deep Insanity: The Lost Child on CineFlixo?

No. CineFlixo is free and you can watch Deep Insanity: The Lost Child without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.

Similar Series You Might Like

If you enjoyed Deep Insanity: The Lost Child, check out The Maid I Hired Recently Is Mysterious, The Brave of Legend Da-Garn, Gosho Aoyama's Collection of Short Stories, 7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy!, and Cat Tales.

Frequently Asked Questions

Where can I watch Deep Insanity: The Lost Child for free?

You can watch Deep Insanity: The Lost Child online for free on CineFlixo. All 12 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.

How many seasons and episodes does Deep Insanity: The Lost Child have?

Deep Insanity: The Lost Child currently has 1 season and a total of 12 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.

What is Deep Insanity: The Lost Child about?

Madness and unawakening sleep, Randolph syndrome. This new illness is slowly but steadily approaching humanity, caused by the huge underground world Asylum that appeared in Antarctica. There are strange creatures different from the earth, and unknown resources. People bet their lives on the depths of the mysterious… It belongs to the Animation, Sci-Fi & Fantasy, Action & Adventure genres.

In which language is Deep Insanity: The Lost Child originally available?

Deep Insanity: The Lost Child was originally produced in JA. On CineFlixo the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.

When was Deep Insanity: The Lost Child first released?

Deep Insanity: The Lost Child first premiered on October 13, 2021 (2021). The series has since concluded its run.