Ep. 6: The group experiments with D-Mail rules while recruiting Moeka as Lab Member No. 005
Aired on May 11, 2011

After naming their time-travel messages D-Mails, the team conducts further tests to understand the system's constraints. They determine the specific parameters for sending these messages, including timing, data capacity, and the maximum distance into the past. The following day, Moeka visits the lab with the intention of viewing the IBN 5100 computer and requesting to borrow it from Okabe. Unable to conceal the true purpose of their experiments from her, Okabe is forced to reveal the truth. Consequently, he officially recruits Moeka as Lab Member No. 005, integrating her into their ongoing research efforts.
Episodes
- Ep. 2 · Okabe encounters Kurisu alive and meets Suzuha while investigating John Titor's reappearance and the IBN 5100.
- Ep. 3 · Okabe discovers the microwave is a time machine after a lab explosion and text rerouting incident.
- Ep. 4 · Okabe and Kurisu seek the IBN 5100 to decrypt SERN's time travel data.
- Ep. 5 · Okabe and Kurisu return with the IBN 5100 while Suzuha warns Okabe about Kurisu.
- Ep. 6 · The group experiments with D-Mail rules while recruiting Moeka as Lab Member No. 005
- Ep. 7 · Okabe tests the Phone Microwave by sending lottery numbers to the past, triggering a world line shift.
- Ep. 8 · Okabe explains world line shifts and Moeka sends a D-Mail altering reality.
- Ep. 9 · Faris reveals her true identity and family history regarding the missing IBN 5100 computer.
- Ep. 10 · Okabe discovers timeline shifts affect Ruka's gender and pursues the missing Suzuha.