This is a list of episodes of the anime.
Season 1[]
The opening theme song for Season 1 is "Borderland" by Mami Kawada and the ending theme song is "Ambivalentidea" by Nagi Yanagi except for Episode 4, where it was replaced by "Shiroku Yawaraka na Hana", also by Yanagi.
| # | Title | Story arc | Original airdate | |
|---|---|---|---|---|
| 1 | 
|
Fire Hare Arc | April 10, 2012 | |
| 2 | 
|
Pulsar Arc | April 17, 2012 | |
| 3 | 
|
Musica Ex Machina Arc | April 24, 2012 | |
| 4 | 
|
Musica Ex Machina Arc | May 1, 2012 | |
| 5 | 
|
Vein Arc
Sea Route Arc |
May 8, 2012 | |
| 6 | 
|
African Golden Butterflies Arc | May 15, 2012 | |
| 7 | 
|
African Golden Butterflies Arc
Air Route Arc |
May 22, 2012 | |
| 8 | 
|
Mondo Grosso Arc | May 29, 2012 | |
| 9 | 
|
Dragon Shooter Arc | June 5, 2012 | |
| 10 | 
|
Dragon Shooter Arc | June 12, 2012 | |
| 11 | 
|
Hill of Destruction Arc | June 19, 2012 | |
| 12 | 
|
Hill of Destruction Arc
Pendulum Arc |
June 26, 2012 |
Season 2[]
The opening theme song is "Undershaft" by Maon Kurosaki. The ending theme song is "Laterality" by Nagi Yanagi, which is replaced in Episode 15 by "Shinjitsu no Hane", also by Yanagi, and Episode 24 by "Your Rainbow" by Caoli Cano.
| # | Title | Story arc | Original airdate | |
|---|---|---|---|---|
| 12.5 | 
|
Recap episode of Season 1 | October 3, 2012 | |
| 13 | 
|
Serpent Looking Up to the Heavens Arc
Dance with Undershaft Arc |
October 9, 2012 | |
| 14 | 
|
Dance with Undershaft Arc | October 16, 2012 | |
| 15 | 
|
Dance with Undershaft Arc | October 23, 2012 | |
| 16 | 
|
Kasper in Asia Arc
Kasper and Jonah Arc |
October 30, 2012 | |
| 17 | 
|
Castle of Lies Arc | November 6, 2012 | |
| 18 | 
|
Castle of Lies Arc | November 13, 2012 | |
| 19 | 
|
Pazuzu Arc | November 20, 2012 | |
| 20 | 
|
New World Arc | November 27, 2012 | |
| 21 | 
|
New World Arc | December 4, 2012 | |
| 22 | 
|
New World Arc | December 11, 2012 | |
| 23 | 
|
War Monger Arc | December 18, 2012 | |
| 24 | 
|
War Monger Arc
Century of Shame Arc |
December 25, 2012 |