The first 29 episodes adapt the rest of the 24th volume through the beginning of the 25th volume as part of the “Sirius Island” (天狼島編, “Tenrōjima-hen”) arc, which focuses on Natsu and the guild’s other strongest members as they take their S-Class examination on Sirius Island, they are interrupted by the arrival of Grimoire Heart, who attempt to retrieve the dark wizard Zeref living on the island.
Next 25 episodes features a completely original, self-contained story arc called “Key of the Starry Heavens” (星空の鍵編, Hoshizora no Kagi-hen), and focus on Natsu and the members of Fairy Tail as they meet a relative of the Heartfilias’, and face a religious sect of warriors and a revived Oración Seis as they try to find the parts to an ancient doomsday weapon.
3 - 1Best Partners Sep. 17, 2011
3 - 2Who's the Lucky One? Sep. 24, 2011
3 - 3Natsu vs. Gildarts Oct. 01, 2011
3 - 4Mest Oct. 08, 2011
3 - 5Black Wizard Oct. 15, 2011
3 - 6Iron Soul Oct. 22, 2011
3 - 7Makarov Charges Oct. 29, 2011
3 - 8Lost Magic Nov. 05, 2011
3 - 9Fire Dragon vs. Flame God Nov. 12, 2011
3 - 10Grand Magic World Nov. 19, 2011
3 - 11Arc of Embodiment Nov. 26, 2011
3 - 12Human Gate Dec. 03, 2011
3 - 13Lucy Fire Dec. 10, 2011
3 - 14Dead-End of Despair Dec. 17, 2011
3 - 15Tears of Love and Vitality Dec. 24, 2011
3 - 16The One Thing I Couldn't Say Jan. 07, 2012
3 - 17Tenrou Tree Jan. 14, 2012
3 - 18Erza vs Azuma Jan. 21, 2012
3 - 19Freezing Fighting Spirit Jan. 28, 2012
3 - 20Power of Life Feb. 04, 2012
3 - 21Rolling Thunder Feb. 11, 2012
3 - 22The Man Without an Emblem Feb. 18, 2012
3 - 23Realm of the Abyss Feb. 25, 2012
3 - 24Daybreak on Tenrou Island Mar. 03, 2012
3 - 25The Right to Love Mar. 10, 2012
3 - 26Let’s Hold Hands Mar. 17, 2012
3 - 27Fairy Tail, Year X791 Mar. 24, 2012
3 - 28The Seven Year Gap Mar. 31, 2012
3 - 29The Magic Ball Apr. 07, 2012
3 - 30True Scoundrels - The Butt Jiggle Gang Apr. 14, 2012
3 - 31The Terror of Invisible Lucy! Apr. 21, 2012
3 - 32Father's Memento Apr. 28, 2012
3 - 33Turbulent Showdown! Natsu vs. Laxus May. 05, 2012
3 - 34Target: Lucy May. 12, 2012
3 - 35The Fury of Legion May. 19, 2012
3 - 36Key of the Starry Heavens May. 26, 2012
3 - 37Travel Companions Jun. 02, 2012
3 - 38Labyrinth Capriccio Jun. 09, 2012
3 - 39Footprints of the Myth! Jun. 16, 2012
3 - 40True Scoundrels, Once Again Jun. 23, 2012
3 - 41Defying Calculation Jun. 30, 2012
3 - 42The Course of the Holy War Jul. 07, 2012
3 - 43Time Begins to Tick Jul. 14, 2012
3 - 44Enter the Neo-Oración Seis! Jul. 21, 2012
3 - 45Get the Infinity Clock! Jul. 28, 2012
3 - 46Dissonance of Battle Aug. 04, 2012
3 - 47Anti-Link Aug. 11, 2012
3 - 48Despair Unleashed Aug. 18, 2012
3 - 49Real Nightmare Aug. 25, 2012
3 - 50Time Spiral Sep. 01, 2012
3 - 51To the Infinity Castle! Sep. 08, 2012
3 - 52Angel Tears Sep. 15, 2012
3 - 53I Hear the Voice of My Friend Sep. 22, 2012
3 - 54Lucy and Michelle Sep. 29, 2012