Dr. X (Dr.X (ドクターエックス) Dokutā Ekkusu) is the 151st chapter of the Dr. Stone manga.


Gen is taken to the American Fortress, where he is amazed to find the cornfield and landing strip.

They arrive at a factory, where they meet a man who is named Dr. Xeno. The doctor straps Gen to a chair, with his feet and hands placed in water. Xeno introduces Gen's captor as Stanley Snyder, an ex-military pilot.

Dr. Xeno intently questions Gen on who he is and where he came from. Gen gives his name and some of his history, though withholds his status as a mentalist. As Xeno is fascinated to hear that the man comes from Japan, stating they are brave to cross the dangers of the Stone World. While Xeno and Snyder talk, Gen realizes what he is placed into resembles a polygraph test and decides to use his mentalist tactics. Gen describes his leader's behavior, as Xeno makes a point that the stranger may either be honest to a fault or a very good liar. He doesn't mind however, saying that he is fond of both types and Stanley resolves to eliminate his colony's scientist, to Gen's worry.

Xeno inquires on the leader scientist's name, knowing Senku would be easily eliminated Gen thinks of someone stronger and replies with "Dr. Taiju". Conveniently, Taiju is on the Perseus sneezing.

Characters in Order of Appearance

Chapter Notes

  • Gen allows himself to be captured and finds the American hideout that is a large fortress.
    • The mentalist finds the cornfield and landing strip for the plane.
    • He's able to fool a primitive polygraph test, further showing his excellent lying.
  • The American pilot is male and his name is Stanley Snyder.
    • Stanley is an ex-military pilot.
    • Stanley is revealed to have been tailing the kingdom of Science, since the Alligator attack.
  • The leader of the American forces is seen and his name is Dr. Xeno.
  • Given the Americans so-far have been ex-military, it explains the hostility and suspicion with which they've reacted.
  • Gen's bluff protects Senku with another; since Taiju doesn't speak English, Senku can act as an interpreter and secretly set up countermeasures while pretending to translate properly.

Site Navigation

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Arcs & Sagas
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 2021222324
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156

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