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Dr. STONE (2019)
Season 4 • Episode 31 • Unknown Known
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Dr. STONE Season 4, Episode 31: Unknown Known
With the computer completed, the team will need a user interface: a TV. Watch Dr. STONE Season 4, Episode 31 Unknown Known in HD free online. Enjoy high-quality streaming of Dr. STONE Season 4, Episode 31 and share your thoughts in the comments below!
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Episodes
37 episodes
RYUSUI VS. SENKU
Senku and his companions finally set off for America in search of corn. However, a dispute arises between Ryusui and Senku shortly after they depart.
24 min
SCIENCE JOURNEY
Maintaining morale will be critical on the long journey to the Americas. Knowing where on the ocean you are is pretty important, too. The crew of the Perseus discuss.
24 min
Light Trap in the Darkness
The Perseus lands in the Americas. They first head to Northern California in search of yellow dent corn, but discover a lot more than that.
24 min
Dr. X
The search party narrowly escaped enemy machine gun fire. Unfortunately, the respite was short-lived.
24 min
DOCTOR VS. DOCTOR
Tensions rise as Dr. Xeno makes his introductions to the Perseus.
24 min
SCIENCE IS ELEGANT
Stanley orders Luna to infiltrate the Perseus and identify Doctor Taiju. Things go sideways when it turns out to be a little too easy.
24 min
The Two Scientists
Senku had gotten his start in rocket building through an email exchange with Doctor Xeno. Their approaches to science soon diverged.
24 min
LOCK ON
NASA scientist Dr. Xeno attempts to pick off the leader of the Kingdom of Science.
24 min
Light of Science
With Senku having been shot, the Kingdom of Science plots its retaliation against Dr. Xeno.
24 min
Dirty Roads
With Senku still confined to the bed, Chrome's team begins work on the tunnel to Xeno's base.
24 min
Those Who Know the Rules; Those Who Make Them
Ryusui and Senku take to the skies in a science versus science dogfight while Xeno's forces mount a ground counterattack.
24 min
Reunion
Xeno's army attacks and when all seems lost, Chrome and his friends finish the tunnel and capture Xeno.
24 min
Watching the Same Moon
The team head to the source of the petrification beam in South America as they flee from Stanley's ship.
24 min
EARTH RACE
Senku and company must flee from Stanley's ship, but they have to make stops to refuel.
24 min
The Escape
With Stanley's ship hot on their tail, can science help Senku and company escape?
24 min
Medusa Mechanism
The team is going to need a weapon for when Stanley inevitably catches up to them.
24 min
Sickening Yet Beautiful
Senku and his team have lost Stanley for now, but they aren't out of — or rather, in — the woods just yet.
24 min
Diamond Heart
The team discovers a giant pile of petrification devices. They take them apart to see what makes them tick.
24 min
Stone Sanctuary
The team begins making, digging for, and polishing diamonds to replace the burnt-out ones inside the devices.
24 min
What I Once Sought to Destroy
Suika is in charge of making sure Senku's plan works, but her kindness becomes an obstacle.
24 min
Our Dr. Stone
With the revival team captured, it's up to Luna and Chelsea to revive everyone when the time comes.
24 min
Until We Meet Again
With the petrification beam approaching, who will get their hands on the revival fluid?
24 min
Scientist, All Alone
Suika gathers the team's statues, sets up camp and gets to work doing science.
24 min
Whole New World
With Senku back, it's only a matter of time before the rest of the Kingdom of Science is revived.
24 min
Future Engine
Senku and Dr. Xeno team up to gather the materials needed to make a rocket engine.
24 min
Fire
The crew arrives in Spain, where they collect fluorite, olive oil and some treats.
24 min
The Universe Is Written in the Language of Mathematics
The New Perseus sets out to India to recruit mathematicians for the space program.
24 min
Dawn of the Computer
The computer that the team is building is a series of toroidal tubes. Senku explains.
24 min
The Truth About the Rocket
The team gets to work wiring up several megabits' worth of memory donuts for their computer.
24 min
Stone to Space
The team will need a stupidly insane amount of electricity to turn their bauxite into an aluminum rocket body.
24 min
Unknown Known
With the computer completed, the team will need a user interface: a TV.
24 min
Challengers of Science
The Kingdom of Science's rocket launches are mired by a string of rapid unscheduled disassemblies.
24 min
Wanting Everything
The team is too small to build a round-trip rocket. They'll need to enlist help from around the world.
24 min
Countdown
Ryusui may need to defer to a better pilot for the moon mission.
24 min
Giant Step
24 min
Episode 36
24 min
Episode 37
24 min