Mystery + Riddle = X
Kagami sees Hiyori with a green rock that is attracting Worms; Tendou finds Tsurugi's butler running a sobo cart and decides to run it for him.
Episodes
41
The Strongest Will Lose 25
ZECT develops an Anti Mimic Bomb to counter the Worms; Kagami learns that his father is the head of ZECT.
42
The Most Evil VS The Most Frightening 25
A group of Natives have been kidnapped and Kagami is chosen to lead the negotiations; Yaguruma challenges Tendou to another tofu battle.
43
I Am Targeting Myself 25
Tendou finds out that his mimic self has crossed over to this world; Kagami is called in to fight a Worm and has his Rider Kick turned against him.
44
What It Means to Live 25
Tendou and Kagami wonder if Hiyori was telling the truth about not wanting to return; ZECT is having a hard time trying to keep an army of Worms out of Area Z.
45
A Big Xmas Earthquake 25
Tendou recruits as many of the Riders into ZECT as possible; Tsurugi asks Misaki out on a Christmas date.
46
Farewell, Tsurugi!! 25
Tsurugi discovers the truth that he is a Worm.
47
Plunging Into the Last Chapter 25
The Natives have made a necklace that detects Worms and ZECT are giving them out to everyone in the city.
48
Tendou Must Die!! 25
Tendou learns that the necklaces are actually turning people into Worms; Kagami joins with the Natives to strive to create a peaceful world.
49
The Path of Heaven 25
Kagami learns of the truth and heads out to stop the world from being turned into Worms.
