S01E57: Depths of Darkness
Shark finally faces off with his archenemy, Quattro! Will Shark get his long awaited revenge, or will he end up sleeping with the fishes?!
Previous Episode 
Season 1
Go With the Flow, Part 1
S1E1 / 11 Apr 2011
Go With the Flow, Part 2
S1E2 / 18 Apr 2011
In the End, Part 1
S1E3 / 25 Apr 2011
In the End, Part 2
S1E4 / 02 May 2011
Flipping Out, Part 1
S1E5 / 09 May 2011
Flipping Out, Part 2
S1E6 / 16 May 2011
The Sparrow, Part 1
S1E7 / 23 May 2011
The Sparrow, Part 2
S1E8 / 30 May 2011
Feline Frenzy
S1E9 / 06 Jun 2011
Shark Attack
S1E10 / 13 Jun 2011
The Pack, Part 1
S1E11 / 20 Jun 2011
The Pack, Part 2
S1E12 / 27 Jun 2011
The Number Hunter, Part 1
S1E13 / 04 Jul 2011
The Number Hunter, Part 2
S1E14 / 11 Jul 2011
Training Days, Part 1
S1E15 / 18 Jul 2011
Training Days, Part 2
S1E16 / 25 Jul 2011
It's in the Cards, Part 1
S1E17 / 01 Aug 2011
It's in the Cards, Part 2
S1E18 / 08 Aug 2011
Events of Happiness
S1E19 / 15 Aug 2011
Roots of the Problem
S1E20 / 22 Aug 2011
Battle with the Bot
S1E21 / 29 Aug 2011
Reginald's Counterattack
S1E22 / 05 Sep 2011
Hunting Down the Hunter, Part 1
S1E23 / 12 Sep 2011
Hunting Down The Hunter, Part 2
S1E24 / 19 Sep 2011
Frozen in Time
S1E25 / 03 Oct 2011
Let the Duels Begin
S1E26 / 10 Oct 2011
A Team Performance
S1E27 / 17 Oct 2011
Heavy Metal
S1E28 / 24 Oct 2011
Love Hurts
S1E29 / 31 Oct 2011
No Tomato
S1E30 / 07 Nov 2011
Life is a Carnival, Part 1
S1E31 / 14 Nov 2011
Life is a Carnival, Part 2
S1E32 / 21 Nov 2011
Foolish Fans
S1E33 / 28 Nov 2011
Shark Bait
S1E34 / 05 Dec 2011
Bad Developments, Part 1
S1E35 / 12 Dec 2011
Bad Developments, Part 2
S1E36 / 19 Dec 2011
Double Jeopardy, Part 1
S1E37 / 26 Dec 2011
Double Jeopardy, Part 2
S1E38 / 09 Jan 2012
Pets Peeved
S1E39 / 16 Jan 2012
About Hart
S1E40 / 23 Jan 2012
Losing Hart
S1E41 / 23 Jan 2012
A Dubious Duo
S1E42 / 06 Feb 2012
The Dragon Awakens
S1E43 / 13 Feb 2012
Rock and a Hard Place
S1E44 / 20 Feb 2012
Ruffled Feathers
S1E45 / 27 Feb 2012
Family Leave
S1E46 / 05 Mar 2012
Sky's the Limit
S1E47 / 12 Mar 2012
Exit: Astral
S1E48 / 19 Mar 2012
Crestfallen
S1E49 / 26 Mar 2012
Party Panic
S1E50 / 09 Apr 2012
Roller Duel!
S1E51 / 16 Apr 2012
Roller Coaster Rampage!
S1E52 / 23 Apr 2012
Test Your Luck!
S1E53 / 30 Apr 2012
Welcome to the Jungle
S1E54 / 07 May 2012
Portal of Doom
S1E55 / 14 May 2012
Cosmic Chaos
S1E56 / 21 May 2012
Depths of Darkness
S1E57 / 28 May 2012
Swimming with Sharks
S1E58 / 04 Jun 2012
Rockin' and Rollin'
S1E59 / 11 Jun 2012
Doctor Visit
S1E60 / 18 Jun 2012
Duel of Destiny: Part 1
S1E61 / 25 Jun 2012
Duel of Destiny: Part 2
S1E62 / 02 Jul 2012
The Hart of the Matter
S1E63 / 09 Jul 2012
Change of Hart
S1E64 / 16 Jul 2012
Sphere of Fear: Part 1
S1E65 / 23 Jul 2012
Sphere of Fear: Part 2
S1E66 / 30 Jul 2012
Sphere of Fear: Part 3
S1E67 / 13 Aug 2012
The Countdown Begins
S1E68 / 20 Aug 2012
A Trio's Challenge: Part 1
S1E69 / 27 Aug 2012
A Trio's Challenge: Part 2
S1E70 / 03 Sep 2012
A Trio's Challenge: Part 3
S1E71 / 10 Sep 2012
Kite's Plight: Part 1
S1E72 / 17 Sep 2012
Kite's Plight: Part 2
S1E73 / 24 Sep 2012
Attack of the Barians: Part 1
S1E74 / 07 Oct 2012
Attack of the Barians: Part 2
S1E75 / 14 Oct 2012
Hard Knox
S1E76 / 21 Oct 2012
Rule Duel
S1E77 / 28 Oct 2012
The Adventures of Artimus Stanleyus
S1E78 / 04 Nov 2012
Doom in Bloom
S1E79 / 11 Nov 2012
Rivals in the Ring
S1E80 / 18 Nov 2012
The Friendship Games
S1E81 / 25 Nov 2012
Sphere Cube Calamity: Part 1
S1E82 / 09 Dec 2012
Sphere Cube Calamity: Part 2
S1E83 / 16 Dec 2012
Playing Defense
S1E84 / 23 Dec 2012
Counter Offensive: Part 1
S1E85 / 06 Jan 2013
Counter Offensive: Part 2
S1E86 / 13 Jan 2013
Dual Duel: Part 1
S1E87 / 20 Jan 2013
Dual Duel: Part 2
S1E88 / 27 Jan 2013
Darkness Dawns
S1E89 / 03 Feb 2013
You Give Love a Bot Name
S1E90 / 10 Feb 2013
Take a Chance
S1E91 / 17 Feb 2013
An Imperfect Couple: Part 1
S1E92 / 24 Feb 2013
An Imperfect Couple: Part 2
S1E93 / 03 Mar 2013
Enter Vector
S1E94 / 10 Mar 2013
The Search for Shadows
S1E95 / 17 Mar 2013
Shadows of Deception
S1E96 / 24 Mar 2013
Sinister Shadows
S1E97 / 31 Mar 2013
Shadows End
S1E98 / 07 Apr 2013
A Duel in Ruins: Part 1
S1E99 / 14 Apr 2013
A Duel in Ruins: Part 2
S1E100 / 21 Apr 2013
The Dark Mist Rises: Part 1
S1E101 / 28 Apr 2013
The Dark Mist Rises: Part 2
S1E102 / 05 May 2013
Barian Vengeance: Part 1
S1E103 / 12 May 2013
Barian Vengeance: Part 2
S1E104 / 19 May 2013
Put to the Test: Part 1
S1E105 / 26 May 2013
Put to the Test: Part 2
S1E106 / 02 Jun 2013
Furry Fury
S1E107 / 09 Jun 2013
A Sea of Troubles: Part 1
S1E108 / 16 Jun 2013
A Sea of Troubles: Part 2
S1E109 / 23 Jun 2013
A World of Chaos: Part 1
S1E110 / 30 Jun 2013
A World of Chaos: Part 2
S1E111 / 07 Jul 2013
Memory Thief: Part 1
S1E112 / 14 Jul 2013
Memory Thief: Part 2
S1E113 / 21 Jul 2013
Tentacles of Terror: Part 1
S1E114 / 28 Jul 2013
Tentacles of Terror: Part 2
S1E115 / 04 Aug 2013
Now or Never: Part 1
S1E116 / 11 Aug 2013
Now or Never: Part 2
S1E117 / 18 Aug 2013
Mission: Astral World, Part 1
S1E118 / 25 Aug 2013
Mission: Astral World, Part 2
S1E119 / 01 Sep 2013
Mission: Astral World, Part 3
S1E120 / 08 Sep 2013
Mission: Astral World, Part 4
S1E121 / 15 Sep 2013
Assimilation: Part 1
S1E122 / 22 Sep 2013
Assimilation: Part 2
S1E123 / 29 Sep 2013
Battle with the Barians
S1E124 / 06 Oct 2013
Fight for a Friend
S1E125 / 13 Oct 2013
Farewell for a Friend
S1E126 / 20 Oct 2013
Settling the Score, Part 1
S1E127 / 27 Oct 2013
Settling the Score, Part 2
S1E128 / 03 Nov 2013
Fists of Fury, Part 1
S1E129 / 10 Nov 2013
Fists of Fury, Part 2
S1E130 / 17 Nov 2013
Power Play
S1E131 / 24 Nov 2013
Barian vs. Barian
S1E132 / 01 Dec 2013
Vector the Victor
S1E133 / 08 Dec 2013
Dragon Strife, Part 1
S1E134 / 15 Dec 2013
Dragon Strife, Part 2
S1E135 / 22 Dec 2013
The Forsaken Palace
S1E136 / 29 Dec 2013
Clash of the Emperors
S1E137 / 19 Jan 2014
The New World
S1E138 / 26 Jan 2014
The Source Code
S1E139 / 02 Feb 2014
A Thousand Ways To Lose
S1E140 / 09 Feb 2014
The Fate of Three Worlds
S1E141 / 16 Feb 2014
The Battle of Three Worlds
S1E142 / 23 Feb 2014
The Future of Three Worlds
S1E143 / 02 Mar 2014
Last First Duel
S1E144 / 09 Mar 2014
Outclassed And Outmatched
S1E145 / 16 Mar 2014
Forever ZEXAL
S1E146 / 23 Mar 2014
Tasuku Hatanaka
Yuma Tsukumo (voice)
Miyu Irino
Astral (voice)
Mikako Komatsu
Kotori Mizuki (voice)
Toshiki Masuda
Ryoga 'Shark' Kamishiro / Nash (voice)
Koki Uchiyama
Kaito Tenjō (voice)
Tomoaki Maeno
Orbital 7 (voice)
Shinji Ogawa
Dr. Faker (voice)
