Oh my...this episode was actually a bit of a tear jerker for me
Out of all the people, Mayushii figured out that Daru was indeed Suzuha's father. There reunion was awkward, yet really touching.
The time machine is fixed and Suzuha travels back to the past to get an IBN5100. The lab members wait, but then Mr. Braun then gives a message to Okarin from Suzuha...and she failed. She lost her memories because the time machine still wasn't completely fixed...and she committed suicide
Okarin then realizes it was all his fault when he sent a D-mail to stop Suzuha from leaving during the raining night, so he sends another D-mail to cancel that D-mail. This actually causes the Divergence meter to go up from .33 to .4.
Although it isn't past the 1% divergence, it seems to have altered Mayuri's fate a bit. Apparently there is no bomb threat yet and the hourglass is intact. This still isn't over yet though, they are still in the Beta timeline which means Mayuri may still die sooner or later.
Now about Suzuha, did anyone notice that she mentioned in the letter that she
remembered Okabe sending the D-mail to stop her from leaving that rainy night? Okabe is the only one with the Reading Steiner, so only he should...yet Suzuha somehow remembered.