Nine universes of the previous Kamen Riders from the Heisei era are merging into one, something that would destroy all the worlds. To prevent this, Tsukasa Kadoya transforms into Kamen Rider Decade and is told that to protect his own world he must travel to all of the other Kamen Riders' worlds (Another Rider's worlds) and eliminate the anomalies in those worlds. Along the way, confronting the mysterious Narutaki and the thief Daiki Kaito, they are joined by Yusuke Onodera of the World of Kuuga and Kivala of the World of Kiva.
Masked Rider DCD (Season 1)
Rider War (Episode 1)
Air date: 2009-01-25
Runtime: 24 min
The World of Kuuga (Episode 2)
Air date: 2009-02-01
Runtime: 24 min
Transcendence (Episode 3)
Air date: 2009-02-08
Runtime: 24 min
Second Movement ♬ Kiva the Prince (Episode 4)
Air date: 2009-02-15
Runtime: 24 min
Qualifications of the Biting King (Episode 5)
Air date: 2009-02-22
Runtime: 24 min
Battle Trial: Ryuki World (Episode 6)
Air date: 2009-03-01
Runtime: 24 min
The True Culprit's Super Trick (Episode 7)
Air date: 2009-03-08
Runtime: 24 min
Welcome to Blade Cafeteria (Episode 8)
Air date: 2009-03-15
Runtime: 24 min
Blade Blade (Episode 9)
Air date: 2009-03-22
Runtime: 24 min
Phantom Thief of Faiz Academy (Episode 10)
Air date: 2009-03-29
Runtime: 24 min
555 Faces, 1 Treasure (Episode 11)
Air date: 2009-04-05
Runtime: 24 min
Reunion: Project Agito (Episode 12)
Air date: 2009-04-12
Runtime: 24 min
Awaken: The Soul Tornado (Episode 13)
Air date: 2009-04-19
Runtime: 24 min
Super Den-O Beginning (Episode 14)
Writer: Yasuko Kobayashi
Air date: 2009-04-26
Runtime: 24 min
Here Comes Super Momotaros! (Episode 15)
Writer: Yasuko Kobayashi
Air date: 2009-05-03
Runtime: 24 min
Warning: Kabuto is Out of Control (Episode 16)
Writer: Kenji Konuta
Air date: 2009-05-10
Runtime: 24 min
The Path of Grandmother's Flavor (Episode 17)
Writer: Kenji Konuta
Air date: 2009-05-17
Runtime: 24 min
Missing Hibiki (Episode 18)
Writer: Shouji Yonemura
Air date: 2009-05-24
Runtime: 24 min
Journey's End (Episode 19)
Writer: Shouji Yonemura
Air date: 2009-05-31
Runtime: 24 min
The Dark Riders of Nega World (Episode 20)
Writer: Toshiki Inoue
Air date: 2009-06-07
Runtime: 24 min
Going Through the Complete Rider Album (Episode 21)
Writer: Toshiki Inoue
Air date: 2009-06-14
Runtime: 24 min
Diend is Wanted (Episode 22)
Writer: Toshiki Inoue
Air date: 2009-06-28
Runtime: 24 min
End of Diend (Episode 23)
Writer: Toshiki Inoue
Air date: 2009-07-05
Runtime: 24 min
The Samurai Squadron Appears (Episode 24)
Writer: Yasuko Kobayashi
Air date: 2009-07-12
Runtime: 24 min
Corrupt Rider, Go Forth! (Episode 25)
Writer: Yasuko Kobayashi
Air date: 2009-07-19
Runtime: 24 min
RX! Great-Shocker Invasion (Episode 26)
Air date: 2009-07-26
Runtime: 24 min
BLACK×BLACK RX (Episode 27)
Air date: 2009-08-02
Runtime: 24 min
Amazon, Friend (Episode 28)
Air date: 2009-08-09
Runtime: 24 min
The Strong Naked Strongman (Episode 29)
Air date: 2009-08-16
Runtime: 24 min
Rider War: Prologue (Episode 30)
Air date: 2009-08-23
Runtime: 24 min
The Destroyer of Worlds (Episode 31)
Writer: Shouji Yonemura
Air date: 2009-08-30
Runtime: 24 min
