第 1 季 共 24 集
播出时间：2011年4月7日
第 1 集 Turning Point
播出时间：2011年4月7日
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.
第 2 集 Time Travel Paranoia
播出时间：2011年4月14日
Okabe is surprised to see Makise up and about after she was killed.
第 3 集 Parallel World Paranoia
播出时间：2011年4月21日
Okabe suspects his microwave oven is behind the recent unusual events.
第 4 集 Interpreter Rendezvous
播出时间：2011年4月28日
Okabe needs to find a very old computer to hack a very new tech.
第 5 集 Starmine Rendezvous
播出时间：2011年5月5日
A successful hack reveals SERN's big secret.
第 6 集 Butterfly Effect's Divergence
播出时间：2011年5月12日
Okabe's small scale experiment is partially successful.
第 7 集 Divergence Singularity
播出时间：2011年5月19日
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.
第 8 集 Chaos Theory Homeostasis I
播出时间：2011年5月26日
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.
第 9 集 Chaos Theory Homeostasis II
播出时间：2011年6月2日
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.
第 10 集 Chaos Theory Homeostasis III
播出时间：2011年6月9日
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.
第 11 集 Dogma in Event Horizon
播出时间：2011年6月16日
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!
第 12 集 Dogma in Ergosphere
播出时间：2011年6月23日
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.
第 13 集 Metaphysics Necrosis
播出时间：2011年6月30日
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?
第 14 集 Physically Necrosis
播出时间：2011年7月7日
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
第 15 集 Missing Link Necrosis
播出时间：2011年7月14日
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.
第 16 集 Sacrificial Necrosis
播出时间：2011年7月21日
The truth about Suzuha's father is finally revealed. Okabe realizes the devastating consequences of stopping her from leaving the night of the party.
第 17 集 Made in Complex
播出时间：2011年7月28日
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.
第 18 集 Fractal Androgynous
播出时间：2011年8月4日
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.
第 19 集 Endless Apoptosis
播出时间：2011年8月11日
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.
第 20 集 Finalize Apoptosis
播出时间：2011年8月18日
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.
第 21 集 Paradox Meltdown
播出时间：2011年8月25日
With his new discovery in mind, Okabe continues his attempts to protect Mayuri while also trying to avoid Kurisu's potential impending fate.
第 22 集 Being Meltdown
播出时间：2011年9月1日
In order to continue his work against SERN, Okabe must finally choose between saving Kurisu or Mayuri.
第 23 集 Open the Steins Gate
播出时间：2011年9月8日
Tasked with preventing an impending World War III by an alternate Suzuha, Okabe finds himself playing an active part in Kurisu's death.
第 24 集 Achievement Point
播出时间：2011年9月15日
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.
