The Tsuchigumo Man Dokumonde

is the fifty-seventh episode of the original Kamen Rider series.
==Synopsis==
Shocker attempts to steal the formula for a liquid explosive that can melt and burn metal that was developed by Hongo's colleague Sawada.
==Plot==
Hongo and Sawada are working late into the night, researching chemistry. When Hongo realizes that Sawada is developing a liquid explosive, he worries it could be misused, but Sawada reassures him that it will be useful for industrial purposes.
Sawada's younger brother, Minoru, calls the lab to ask when Sawada will return home. Sawada apologizes, saying he's going to continue to work. After hanging up, he tells Hongo he'll make it up to Minoru later by taking him on a trip to the mountains.
After Hongo leaves the lab for the evening, Sawada makes a breakthrough. He excitedly tests the new liquid explosives and takes down data on how it can burn through metals in his lab notebook. Unbeknownst to him, Purse-spider Man, Spiderond, is spying through the window and witnesses the new discovery.
After killing the lab's security guard by dragging him into a spider-den and turning him into a skeleton, Spiderond commands his Shocker combatants to set a trap for Sawada, in order to steal the research data after it's completed. When Sawada leaves the lab in the morning to drive home, Spiderond attempts to grab the briefcase holding the lab notebook, but Sawada manages to shake him off and drive away. Spiderond and several Shocker Combatmen on motorcycles pursue, and drive him off the road into a ravine. His car explodes, incinerating the notebook.
Hongo, driving his motorcycle nearby, hears the explosion and hurries over to investigate. He finds Spiderond and the Combatmen, and tries to fight them, but Spiderond flees underground.
Later, Hongo, Goro, and Minoru sit vigil at Sawada's hospital bed. When the hospital director arrives, Hongo asks about Sawada's prospects for recovery. The director explains that though they performed one successful surgery already, Sawada's life is still in danger, and he will need another surgery to survive. The second surgery is scheduled for the afternoon of the next day.
At the latest Shocker base, Ambassador Hell upbraids Spiderond for failing to steal the data, and even worse, destroying it and killing its creator. Shocker was planning on using the substance to dissolve everything in Japan made of metal. When he announces that Spiderond and his team of Combatmen will be put to death for their failure, the leader of Shocker interjects, informing them all that Sawada is still alive. He commands Spiderond to continue the mission and abduct Sawada. Ambassador Hell plans to remove Sawada's brain from his dying body and make him into a cyborg, so he will obediently mass-produce the liquid explosive for Shocker.
Back at the Tachibana Racing club, Hongo and the others make a plan to watch over Sawada and Minoru. Their plans pay off when Spiderond crawls up the side of the hospital and attempts to abduct Sawada from his bed, only to be beaten back by Hongo and Taki. The two of them and Tachibana maintain watch in the hospital for the rest of the night.
As the hospital director drives to work in the morning, he's ambushed by Spiderond and the Combatmen. Spiderond kills him and assumes his identity, infiltrating the hospital. He rudely commands a nurse to move Sawada's second surgery up the schedule into the morning instead of the afternoon. When Tachibana, Taki, and Hongo come to investigate the change in schedule, Spiderond tries to deny them access to witness the surgery. When Hongo protests that not allowing a witness is against regulations, he relents, but insists that they stay out until after the check-up is complete and anesthesia has been applied. As soon as Spiderond is behind closed doors, he knocks out the nurse, and he and his Combatmen abduct Sawada. Hongo and the others become suspicious at how long the supposed "checkup" is taking, and when they investigate, they discover the unconscious nurse, deducing that Sawada has been taken by Shocker.
Back at the Shocker Base, Ambassador Hell oversees the preparations to transfer Sawada's brain into the body of one of Shocker's prisoners.
At the Tachibana Racing club, Hongo and the others try to figure out where Sawada was taken. Goro returns from spider-hunting outside, hoping the spider he caught will help the search. Hongo realizes that since Spiderond is based on a spider, his feet should produce the same non-stick oil that actual spiders use to avoid sticking to their own webs. Since Hongo's eyes have been modified to be twenty times sharper than a normal human's, he can see the residue left by Spiderond's footsteps, and if Hongo follows the footprints Spiderond left when he fled the hospital, he can trace them back to Shocker's base.
After following the trail, Hongo finds the building that Shocker has constructed their base under. Combatmen rush out to attack him, but he leaves Taki to handle them while he goes inside to rescue Sawada. He interrupts the Shocker scientists before they can begin the transplant surgery. Spiderond attacks him, taking the fight outside the base. He attempts to strangle Taki with webs, but is foiled by Hongo. Then, he attempts to pull Hongo into one of his underground burrows, but Hongo shakes him off and throws him into the air, finishing him off with a Rider Kick. Both Spiderond and the Shocker base explode.
After being rescued, Sawada's second surgery goes well, and he recovers from his injury.
==Cast==
to be added
==Errors==
to be added
==Notes==
to be added
==Digital Releases==
*Kamen Rider DVD Volume 10 features episodes 56-61.http://www.toei-video.co.jp/DVD/riderguide.html#l2-3
*Kamen Rider Blu-ray Volume 3 features episodes 53-79.https://www.toei-video.co.jp/special/riderbox/
S_1_10.jpg|Kamen Rider DVD Volume 10
Series_1_Volume_3.jpg|Kamen Rider Blu-ray Volume 3
==References==