S04E18: Diamond Heart
The team discovers a giant pile of petrification devices. They take them apart to see what makes them tick.
Previous Episode 
Season 1
Stone World
S1E1 / 05 Jul 2019
King of the Stone World
S1E2 / 12 Jul 2019
Weapons of Science
S1E3 / 19 Jul 2019
Fire the Smoke Signal
S1E4 / 26 Jul 2019
Stone World The Beginning
S1E5 / 02 Aug 2019
Two Nations of the Stone World
S1E6 / 09 Aug 2019
Where Two Million Years Have Gone
S1E7 / 16 Aug 2019
Stone Road
S1E8 / 23 Aug 2019
Let There Be the Light of Science
S1E9 / 30 Aug 2019
A Flimsy Alliance
S1E10 / 06 Sep 2019
Clear World
S1E11 / 13 Sep 2019
Buddies Back to Back
S1E12 / 20 Sep 2019
Masked Warrior
S1E13 / 27 Sep 2019
Master of Flame
S1E14 / 04 Oct 2019
The Culmination of Two Million Years
S1E15 / 11 Oct 2019
A Tale for the Ages
S1E16 / 18 Oct 2019
A Hundred Nights and a Thousand Skies
S1E17 / 25 Oct 2019
Stone Wars
S1E18 / 01 Nov 2019
To Modernity
S1E19 / 08 Nov 2019
The Age of Energy
S1E20 / 15 Nov 2019
Spartan Crafts Club
S1E21 / 22 Nov 2019
The Treasure
S1E22 / 29 Nov 2019
Wave of Science
S1E23 / 06 Dec 2019
Voices Over Infinite Distance
S1E24 / 13 Dec 2019
Season 2
Stone Wars Beginning
S2E1 / 14 Jan 2021
Hot Line
S2E2 / 21 Jan 2021
Call from the Dead
S2E3 / 28 Jan 2021
Full Assault
S2E4 / 04 Feb 2021
Steam Gorilla
S2E5 / 11 Feb 2021
Prison Break
S2E6 / 18 Feb 2021
Secret Mission
S2E7 / 25 Feb 2021
Final Battle
S2E8 / 04 Mar 2021
To Destroy and to Save
S2E9 / 11 Mar 2021
Humanity's Strongest Tag Team
S2E10 / 18 Mar 2021
PROLOGUE OF Dr. STONE
S2E11 / 25 Mar 2021
Season 3
NEW WORLD MAP
S3E1 / 06 Apr 2023
Greed Equals Justice
S3E2 / 13 Apr 2023
First Contact
S3E3 / 20 Apr 2023
Eyes of Science
S3E4 / 27 Apr 2023
Science Vessel Perseus
S3E5 / 04 May 2023
TREASURE BOX
S3E6 / 11 May 2023
Ray of Despair, Ray of Hope
S3E7 / 18 May 2023
The Trump Card Aboard the Science Vessel
S3E8 / 25 May 2023
Beautiful Science
S3E9 / 01 Jun 2023
SCIENCE WARS
S3E10 / 08 Jun 2023
With This Fist, a Miracle
S3E11 / 15 Jun 2023
The Kingdom of Science's Counterattack
S3E12 / 12 Oct 2023
The Medusa's True Face
S3E13 / 19 Oct 2023
Deal Game, Test of Wit
S3E14 / 26 Oct 2023
Battle in Three Dimensions
S3E15 / 02 Nov 2023
Total War
S3E16 / 09 Nov 2023
JOKER
S3E17 / 16 Nov 2023
Flicker of Doom
S3E18 / 23 Nov 2023
LAST MAN STANDING
S3E19 / 30 Nov 2023
FIRST DREAM
S3E20 / 07 Dec 2023
Treasure Island
S3E21 / 14 Dec 2023
BEYOND THE NEW WORLD
S3E22 / 21 Dec 2023
Season 4
RYUSUI VS. SENKU
S4E1 / 09 Jan 2025
SCIENCE JOURNEY
S4E2 / 16 Jan 2025
Light Trap in the Darkness
S4E3 / 23 Jan 2025
Dr. X
S4E4 / 30 Jan 2025
DOCTOR VS. DOCTOR
S4E5 / 06 Feb 2025
SCIENCE IS ELEGANT
S4E6 / 13 Feb 2025
The Two Scientists
S4E7 / 20 Feb 2025
LOCK ON
S4E8 / 27 Feb 2025
Light of Science
S4E9 / 06 Mar 2025
Dirty Roads
S4E10 / 13 Mar 2025
Those Who Know the Rules; Those Who Make Them
S4E11 / 20 Mar 2025
Reunion
S4E12 / 27 Mar 2025
Watching the Same Moon
S4E13 / 10 Jul 2025
EARTH RACE
S4E14 / 17 Jul 2025
The Escape
S4E15 / 24 Jul 2025
Medusa Mechanism
S4E16 / 31 Jul 2025
Sickening Yet Beautiful
S4E17 / 07 Aug 2025
Diamond Heart
S4E18 / 14 Aug 2025
Stone Sanctuary
S4E19 / 21 Aug 2025
What I Once Sought to Destroy
S4E20 / 28 Aug 2025
Our Dr. Stone
S4E21 / 04 Sep 2025
Until We Meet Again
S4E22 / 11 Sep 2025
Scientist, All Alone
S4E23 / 18 Sep 2025
Whole New World
S4E24 / 25 Sep 2025
Yusuke Kobayashi
Senku Ishigami (voice)
Makoto Furukawa
Taiju Oki (voice)
Kana Ichinose
Yuzuriha Ogawa (voice)
Manami Numakura
Kohaku (voice)
Gen Sato
Chrome (voice)
Kengo Kawanishi
Asagiri Gen (voice)
