|This article is about a/an episode in Mirai Sentai Timeranger.|
Ayase Retires!? (アヤセ脱退！？ Ayase Dattai!?) is the fortieth episode of Mirai Sentai Timeranger. It is the conclusion of the two-part story involving Ayase's Osiris Syndrome being revealed to the other Timerangers, as well as the conflict this knowledge causes.
As Tatsuya reveals the truth of Ayase's condition to the other Timeranger, they must determine whether his terminal condition is a liability for the completion of their mission in the past.
The rest of the team (along with Naoto who overhears them) has now learned Ayase's secret, he is slowly dying from Osiris Syndrome, while Don Dolnero punishes Gien for his treachery. Meanwhile, the City Guardians have finally finished recreating the vaccine for the Reda Virus but the Londerz Family plans to steal it as their only reason to provide them with the vaccine was to steal and profit off it. The team heads out to stop them but without Ayase. Is this his end as a member of the Timerangers?
- Tatsuya Asami (浅見 竜也 Asami Tatsuya): Masaru Nagai (永井 大 Nagai Masaru)
- Ayase (アヤセ): Yūji Kido (城戸 裕次 Kido Yūji)
- Sion (シオン Shion): Masahiro Kuranuki (倉貫 匡弘 Kuranuki Masahiro)
- Domon (ドモン): Shūhei Izumi (和泉 宗兵 Izumi Shūhei)
- Yuri (ユウリ Yūri): Mika Katsumura (勝村 美香 Katsumura Mika)
- Naoto Takizawa (滝沢 直人 Takizawa Naoto): Shinji Kasahara (笠原 紳司 Kasahara Shinji)
- Navigator Robo Tac (ナビゲーターロボタック Nabigētā Robo Takku, Voice): Yūsuke Numata (沼田 祐介 Numata Yūsuke)
- Lila (リラ Rira): Asami Kuru (久瑠 あさ美 Kuru Asami)
- Don Dolnero (ドン・ドルネロ Don Dorunero, Voice): Ryūzaburō Ōtomo (大友 龍三郎 Ōtomo Ryūzaburō)
- Gien (ギエン Voice): Kōji Tobe (戸部 公爾 Tobe Kōji)
- Serial Thief Dorba (連続窃盗犯・ドーバ Renzoku Settōhan Dōba, Voice): Daisuke Kishio (岸尾 だいすけ Kishio Daisuke)
- Doctor: So Funeda (舟田 走 Funeda Sō)
- Reporter: Hideyuki Sakuma (佐久間英之 Sakuma Hideyuki)
- Researcher: Velo Takeda (Velo武田 Bero Takeda)
- to be added
DVD releasesMirai Sentai Timeranger Volume 4 features episodes 31-40. 
- Full Exposure - Power Rangers counterpart in Time Force. See comparison page.
- Dawn of Destiny - Power Rangers counterpart in Time Force. See comparison page. (similar plot elements)
- Nadira's Dream Date - Power Rangers counterpart in Time Force. See comparison page.