Season 1

01 Turning Point Episode 16th April 2011 A self-described mad scientist attends a lecture on time travel, stumbles upon the dead body of a familiarly unfamiliar woman, and discovers that his text messages are no longer bound by the rules of space and time. 02 Time Travel Paranoia Episode 213th April 2011 Okabe is surprised to see Makise up and about after she was killed. 03 Parallel World Paranoia Episode 320th April 2011 Okabe suspects his microwave oven is behind the recent unusual events. 04 Interpreter Rendezvous Episode 427th April 2011 Okabe needs to find a very old computer to hack a very new tech. 05 Starmine Rendezvous Episode 54th May 2011 A successful hack reveals SERN's big secret. 06 Butterfly Effect's Divergence Episode 611th May 2011 Okabe's small scale experiment is partially successful. 07 Divergence Singularity Episode 718th May 2011 Okabe takes his experimentation to the next level by texting the winning lotto numbers back in time, but he fails to consider how his actions might alter the present - or the future. 08 Chaos Theory Homeostasis I Episode 825th May 2011 The latest experiment for Okabe and his lab mates leads to the disappearance of one of their own. Next, they'll attempt to use their time travel technology to make a young boy's dream a reality. 09 Chaos Theory Homeostasis II Episode 91st June 2011 Okabe grows concerned over the drastic changes his experimentation is causing, and the IBN-5100 disappears from the lab. The only hope for finding a replacement rests upon the delicate shoulders of Feyris the cat girl. 10 Chaos Theory Homeostasis III Episode 108th June 2011 The part-time warrior from downstairs tells Okabe about the search for her missing father. Meanwhile, the aspiring mad scientist is troubled by a mysterious text message. 11 Dogma in Event Horizon Episode 1115th June 2011 As the lab members prepare to transport human memories by way of a Time Leap, Okabe receives some highly disturbing news: Makise may be a SERN spy! 12 Dogma in Ergosphere Episode 1222nd June 2011 Tension builds at the Lab when Makise and Suzuha both show up for the party, but that's just the beginning. As the night draws to a close, armed thugs - led by a familiar face - come looking for the time machine. 13 Metaphysics Necrosis Episode 1329th June 2011 Okabe, desperate to prevent the tragedy he's already seen happen, summons the courage for a daring Time Leap. Can he save the life of his oldest and dearest companion? 14 Physically Necrosis Episode 146th July 2011 Despite his many attempts, Okabe is unable to prevent the death of Mayuri, so he turns to Makise for help solving the riddle of time travel. Later, Suzuha's true identity is revealed 15 Missing Link Necrosis Episode 1513th July 2011 Suzuha reveals the orgins of SERN's future totalitarianism. While she continues her work to destroy the organization, Okabe and Mayuri continue the search for Suzuha's father. 16 Sacrificial Necrosis Episode 1620th July 2011 The truth about Suzuha's father is finally revealed. Okabe realizes the devastating consequences of stopping her from leaving the night of the party. 17 Made in Complex Episode 1727th July 2011 After the change in divergence fails to have a lasting effect, Okabe and Kurisu set out to further manipulate time in the hopes of gaining an IBN 5100. 18 Fractal Androgynous Episode 183rd August 2011 In a further attempt to rescue Mayuri from her fate, Okabe reveals Ruka's past to her. Ruka must make a difficult decision that might change her entire life. 19 Endless Apoptosis Episode 1910th August 2011 Okabe must make a time leap in order to save Moeka from herself. He realizes that all is not what it seems as Moeka's shady behavior leads him closer to the IBN 5100. 20 Finalize Apoptosis Episode 2017th August 2011 With the help of Kurisu and Moeka, Okabe attempts to get closer to the IBN 5100 and the mysterious FB. As he closes in on SERN's network, he realizes that the path to victory will not be without additional sacrifice. 21 Paradox Meltdown Episode 2124th August 2011 With his new discovery in mind, Okabe continues his attempts to protect Mayuri while also trying to avoid Kurisu's potential impending fate. 22 Being Meltdown Episode 2231st August 2011 In order to continue his work against SERN, Okabe must finally choose between saving Kurisu or Mayuri. 23 Open the Steins Gate Episode 237th September 2011 Tasked with preventing an impending World War III by an alternate Suzuha, Okabe finds himself playing an active part in Kurisu's death. 24 Achievement Point Episode 2414th September 2011 Okabe has one final chance to travel back in time, set everything right, and save the girl he never even got to love. His mission is vital, but it may mean the end for the mad scientist.