S02E15: War
A conqueror from another world becomes a wild card in an intergalactic game of supremacy -- placing planet Earth square in the jackpot.
Previous Episode 
Season 1
Independence Day (1)
S1E1 / 26 Nov 2010
Fireworks (2)
S1E2 / 26 Nov 2010
Welcome to Happy Harbor
S1E3 / 21 Jan 2011
Drop-Zone
S1E4 / 28 Jan 2011
Schooled
S1E5 / 04 Feb 2011
Infiltrator
S1E6 / 11 Feb 2011
Denial
S1E7 / 18 Feb 2011
Downtime
S1E8 / 04 Mar 2011
Bereft
S1E9 / 11 Mar 2011
Targets
S1E10 / 16 Sep 2011
Terrors
S1E11 / 23 Sep 2011
Homefront
S1E12 / 30 Sep 2011
Alpha Male
S1E13 / 07 Oct 2011
Revelation
S1E14 / 14 Oct 2011
Humanity
S1E15 / 21 Oct 2011
Failsafe
S1E16 / 04 Nov 2011
Disordered
S1E17 / 11 Nov 2011
Secrets
S1E18 / 18 Nov 2011
Misplaced
S1E19 / 03 Mar 2012
Coldhearted
S1E20 / 10 Mar 2012
Image
S1E21 / 17 Mar 2012
Agendas
S1E22 / 24 Mar 2012
Insecurity
S1E23 / 31 Mar 2012
Performance
S1E24 / 07 Apr 2012
Usual Suspects
S1E25 / 14 Apr 2012
Auld Acquaintance
S1E26 / 21 Apr 2012
Season 2
Happy New Year
S2E1 / 28 Apr 2012
Earthlings
S2E2 / 05 May 2012
Alienated
S2E3 / 12 May 2012
Salvage
S2E4 / 19 May 2012
Beneath
S2E5 / 26 May 2012
Bloodlines
S2E6 / 02 Jun 2012
Depths
S2E7 / 09 Jun 2012
Satisfaction
S2E8 / 29 Sep 2012
Darkest
S2E9 / 06 Oct 2012
Before the Dawn
S2E10 / 05 Jan 2013
Cornered
S2E11 / 12 Jan 2013
True Colors
S2E12 / 19 Jan 2013
The Fix
S2E13 / 26 Jan 2013
Runaways
S2E14 / 02 Feb 2013
War
S2E15 / 09 Feb 2013
Complications
S2E16 / 16 Feb 2013
The Hunt
S2E17 / 23 Feb 2013
Intervention
S2E18 / 02 Mar 2013
Summit
S2E19 / 09 Mar 2013
Endgame
S2E20 / 16 Mar 2013
Season 3
Princes All
S3E1 / 04 Jan 2019
Royal We
S3E2 / 04 Jan 2019
Eminent Threat
S3E3 / 04 Jan 2019
Private Security
S3E4 / 11 Jan 2019
Away Mission
S3E5 / 11 Jan 2019
Rescue Op
S3E6 / 11 Jan 2019
Evolution
S3E7 / 18 Jan 2019
Triptych
S3E8 / 18 Jan 2019
Home Fires
S3E9 / 18 Jan 2019
Exceptional Human Beings
S3E10 / 25 Jan 2019
Another Freak
S3E11 / 25 Jan 2019
Nightmare Monkeys
S3E12 / 25 Jan 2019
True Heroes
S3E13 / 25 Jan 2019
Influence
S3E14 / 02 Jul 2019
Leverage
S3E15 / 02 Jul 2019
Illusion of Control
S3E16 / 02 Jul 2019
First Impression
S3E17 / 09 Jul 2019
Early Warning
S3E18 / 16 Jul 2019
Elder Wisdom
S3E19 / 23 Jul 2019
Quiet Conversations
S3E20 / 30 Jul 2019
Unknown Factors
S3E21 / 06 Aug 2019
Antisocial Pathologies
S3E22 / 13 Aug 2019
Terminus
S3E23 / 20 Aug 2019
Into the Breach
S3E24 / 27 Aug 2019
Overwhelmed
S3E25 / 27 Aug 2019
Nevermore
S3E26 / 27 Aug 2019
Season 4
Inhospitable
S4E1 / 16 Oct 2021
Needful
S4E2 / 16 Oct 2021
Volatile
S4E3 / 21 Oct 2021
Involuntary
S4E4 / 28 Oct 2021
Tale of Two Sisters
S4E5 / 04 Nov 2021
Artemis Through the Looking-Glass
S4E6 / 11 Nov 2021
The Lady, or the Tigress?
S4E7 / 18 Nov 2021
I Know Why the Caged Cat Sings
S4E8 / 25 Nov 2021
Odnu!
S4E9 / 02 Dec 2021
Nomed Esir!
S4E10 / 09 Dec 2021
Teg Ydaer!
S4E11 / 16 Dec 2021
Og Htrof Dna Reuqnoc!
S4E12 / 23 Dec 2021
Kaerb Ym Traeh!
S4E13 / 30 Dec 2021
Nautical Twilight
S4E14 / 31 Mar 2022
Ebb Tide
S4E15 / 31 Mar 2022
Emergency Dive
S4E16 / 31 Mar 2022
Leviathan Wakes
S4E17 / 07 Apr 2022
Beyond the Grip of the Gods!
S4E18 / 14 Apr 2022
Encounter Upon the Razor's Edge!
S4E19 / 21 Apr 2022
Forbidden Secrets of Civilizations Past!
S4E20 / 28 Apr 2022
Odyssey of Death!
S4E21 / 05 May 2022
Rescue and Search
S4E22 / 12 May 2022
Ego and Superego
S4E23 / 19 May 2022
Zenith and Abyss
S4E24 / 26 May 2022
Over and Out
S4E25 / 02 Jun 2022
Death and Rebirth
S4E26 / 09 Jun 2022
Jesse McCartney
Dick Grayson / Robin / Nightwing (voice)
Khary Payton
Kaldur'ahm / Aquaman (voice)
Nolan North
Conner Kent / Superboy (voice)
Danica McKellar
M'gaan M'orzz / Megan Morse / Miss Martian (voice)
Stephanie Lemelin
Artemis Crock / Artemis / Tigress (voice)
Greg Cipes
Garfield Logan / Beast Boy (voice)
Lacey Chabert
Zatanna Zatara / Zatanna (voice)
