Operation Vega

When Rintaro Okabe reawakens his Hououin Kyouma persona, he begins to devise a plan that would let Mayuri Shiina and Suzuha travel to the past by preventing DURPA and other opposing factions from destroying the time machine.

Execution of the Plan
Despite all the efforts of the Future Gadget Lab members, FB and Moeka Kiryu, the arrival of DURPA remains a world line convergence, and Okabe's plan to aid Mayuri and Suzuha would thus in its current state always result in failure.

Quickly realising that they would never be able to succeed, Okabe, Daru and Maho Hiyajo come up with a new, but drastic possible solution. They send a D-RINE to the Daru in the past to prevent Amadeus Kurisu from ever being created.

While Okabe is about to head to C204, Alexis Leskinen unexpectedly catches up with him in the stairwell up to the Radio Kaikan roof. Even though the Amadeus System had never been developed and Leskinen had not brainwashed Kagari, he is still suspicious of the Lab Members and had stalked them. Fortunately for Okabe, Moeka helps him in restraining Leskinen and reaching the roof.