As we all know, Kamen Rider OOO will be on break for at least 2 weeks but it didn't prevent From Television, TV Guide, Bros, Station, TV Life and Newtype to post the episode guides for Episodes 17-20! To those who missed the older spoilers regarding Episodes 16 and 19, you can check it here.
Episode 17
Kamen Rider Birth joins the battle, his identity is actually Akira Date. Eiji and Ankh knows that Kougami Foundation is behind Kamen Rider Birth, but they don't know Date's goal. Ankh becomes more cautious, while Eiji seems to get along with him.
On the other side, a girl practicing kendo wishes to become stronger. Uva creates a Yummy from her. This Yummy later becomes the Beetle Yummy.
Episode 18
Airs at: 1/16
Script: Yasuko Kobayashi
Director: Takayuki Shibasaki
The Kabuto Beetle Yummy who was created by the kendo girl's greed, split up in order to create the Stag Beetle Yummy from itself. Eiji becomes confused while fighting the separated while fighting the Yummies. Kamen Rider Birth shows up and beats up the Kabuto Beetle Yummy and says, "From here on, I'll be the one who takes all the Cell Medals."
Ankh explains that there is a reason why the Yummy divided itself, which is because the kendo girl had another wish.
Episode 19
Airs at: 1/23
Script: Yasuko Kobayashi
Director: Hidenori Ishida
Eiji wakes up and sees Gotou cleaning the Cous Cousier restaurant. According to Chiyoko, Gotou has started working there. Satonaka shows up at the restaurant and says that Kougami wants to talk to Eiji. Eiji follows Satonaka to Kougami's headquarters and is greeted with a Core Medal as a present. Meanwhile, a robber escapes from prison.
Episode 20
Airs at: 1/30
Akira Date shows up at Cous Cousier to pay Gotou a visit. Ankh takes a Core Medal from Kazari, while Eiji is pushed off the roof. Hina gets angry at Ankh because of this and takes one of the Core Medals and threatens to crush it.
Special thanks to DecaEnd for the translations!
