Avengers Earth's Mightiest Heroes season 3 is the fiction third season to the cult hit show of the same name. It finishes all plot points established in Season 2, introduces more new characters and Avengers who join the team. The series all has further connectivity with its sister show, Wolverine and the X-Men.
Main plot points established in Season 3 is the Infinity Gems and the arrival of Thanos, which leads to the team splitting into smaller factions - The Avengers - The West Coast Avengers - The Secret Avengers. Other major stories included are Ragnarok and Planet Hulk. it is followed by EMH: 10 Years Later.
A vs X
- After facing Galactus there is a time of peace in the world, but when the Brotherhood of Mutants attacks NYC in the name of their cause, the Avengers team up with the X-Men to defeat a common enemy. The group also meet the mysterious Maximoff twins. The group also receive a warning from the mutant Destiny that the mad titan is coming.
- The Maximoff twins Quicksilver and Scarlet Witch arrive at Avengers Mansion looking to join the side of good. They are tracked by the mutant-hunting Sentinels and public opinion against mutants. Cap and Hawkeye take it to train the twins to fight for good.
- As an escaped Mar-Vell arrives on Earth with a mysterious gem he's tracked by the galactic warlord Thanos who is on a quest to court death. He destroys the mansion, takes the Space Gem, and leaves the Avengers running for their lives. The team splits up and Hulk is captured by Thanos' forces. Panther, Cap and Clint are all left alone as the rest of Avengers escape in a broken Quinjet.
- On the run, the Avengers (Iron Man, Ms.Marvel, Wasp, Yellowjacket, Vision Quicksilver, Scarlet Witch) try to blend in as they look for refuge. The dying Mar-Vell hands the mantle of Captain Marvel to Carol. Thor returns to Asgard, worried for the infinity stone it harbours. The group fight the Black Order, the children of Thanos.
- Tony has to head back to Stark Industries after his designs are left unguarded and leaked by a business rival Justin Hammer. He and Rhodey must fight off rival drones, leading Tony to pass Avengers leadership over to Carol while he protects his creations from getting into the wrong hands. He sends Rhodey to locate Clint, Steve and T'Challa.
- Clint heads to the West Coast, where he locates his ex-flame Mockingbird in San Fransisco. The two hide in a mansion after discovering the Masters of Evil have made a deal with Thanos to hunt the Avengers. The duo are joint by War Machine in defending against the odds, using their humanity to turn Wonder Man against the team and found the West Coast Avengers.
- Steve heads to a S.H.I.E.L.D Headquarters to find it ransacked by HYDRA. Nick Fury arrives with Black Widow and the Falcon and asks Steve if he can lead a search for who caused this. He is untrustworthy of the group, but after learning Bucky has been captured by HYDRA again, he leads the new team to find his old friend.
- Carol leads her first Avengers mission after Hank finds a signal to what may be another 'Infinity Gem' in the Atlantic Ocean. They head underwater to find the lost city of Atlantis and it's leader Namor, the half-mutant, who is confrontational to the Avengers, distracting his people enough to get the gem stolen.
- T'Challa returns to defend his home country of Wakanda from Thanos' incoming invasion, only to find a distant relative, Eric Killmonger, there to fight for the throne.
Ragnarok Part. I
- Thor returns to Asgard worried for the Soul Gem at the centre of Asgard, but it's in fact Sutur and Enchantress with the army of fire demons that arrive to destroy Asgard. Thor enlists the help of Loki to defend his home.
Ragnarok Part. II
- With Odin dead, the Odinforce has passed to Thor, who has made peace with his brother and assembles a galactic team to defeat Sutur including Loki, Sif, The Warrior's Three and the Guardians of the Galaxy, sacrificing the Soul Stone to Thanos in order to cause chaos and reclaim his home.
Even an Android can cry
- The Vision is training new member Scarlet Witch and the two grow a bond with each other as she teaches him about human culture and emotion. The duo are tracked by Taskmaster, a mercenary who can copy fighting styles of those he watches. The duo use their creativity to outsmart the villain, proving The Vision has emotions in the process.
- Hank and Jan track the next infinity gem, leading them to the Sanctum Santorum and the Sorcerer Supreme himself, Dr.Steven Strange.Hank and Jan reconnect after his accident and fall for one another again. Hank takes a one-way trip forward in time with powerful magic, in order to find the mysterious Time Gem from its owner - Kang.
- Hank has travelled into the far future, where time has changed for the better and is no longer a dystopia caused by Steve. Hank is reckless and defeated by Kang, but after bumping into his grandaughter Hope he snaps out of his self-destructive mentality and the two steal the stone from Kang, returning to modern-day.
Planet Hulk Part. I
- As a prisoner of Thanos, Hulk is sold off and forced to fight in a gladiatorial arena for entertainment on the planet Sakar. With no consequences to his strength, he is able to use all his might and becomes the champion of the arena, using his followers to fight back against the evil Red King.
Planet Hulk Part. II
- The Hulk leads a rebellion against the Red King and his Power Gem that keeps the people at bay. With chaos on Sakkar, Thanos arrives with his plan complete, taking the power gem from the weakened planet. The Hulk heads for Earth in revenge, bringing his war-bound with him.
Under the Hood
- Cap leads the 'Secret Avengers' to finally capture Bucky Barnes. The two bond over the past and face off against the villain Crossbones. Black Widow makes amends for her past and Bucky becomes free of brainwashing. Together they return to locate and join the rest of the Avengers.
- Clint leads his West Coast team against the arrival of Jocosta, a female version of Ultron who uses stealth and manipulation to get what she desires. Wonder Man believes she can be redeemed, with the team aiming to stop and reprogram her for good.
Age of Ultron
- The main and West Coast Avengers are reunited as they plan to use their inside robot to defeat Ultron once and for all. The Vision has another plan however, and uses Jocosta's humanity to Bargain with Ultron to help them in the upcoming war against Thanos.
- The final battle begins as Thanos returns to Earth for the Gems with Power, Space, Soul, Reality and Mind Gems already in his possession. The team defend the time stone as T'Challa, Thor and Steve's secret Avengers reunite to fight the mad titan and his children.
World War Hulk
- With the battle for Earth going downhill, the arrival of Hulk and his Warbound is able to turn the tides of war. It's not enough, as Thanos is able to get the Time Stone and Snap all life out of existence. The Avengers have a trick up their sleeve, however, sending Wasp back in time before they lost.
Dust to Dust
- Back 24 hours before the Snap, Janet Van Dyne gathers the heroes of the world, Spider-Man, the X-Men, The Guardians of the Galaxy, The Fantastic Four, the Heroes for Hire and every other hero across the world to rematch against Thanos, eventually defeating him and saving the day as Earth's Mightiest Heroes.
Avengers (Main Team)
- Carol Danvers / Captain Marvel - The new leader of the team. upon Mar-Vell's death he passes the mantle of Captain to her, and with Tony, Thor and Steve all gone she leads the team.
- Janet Van Dyne / Wasp - The most loyal member of the team, Janet remains at the heart until the end, being integral for winning the day against Thanos. She also reconnects with Hank.
- Tony Stark / Iron Man - Tony leads the team briefly after Galactus, but soon retires to lead the Avengers from outside the action. Realizing the world needs heroes he steps back and becomes more of a manager. He returns briefly to fight Thanos but soon then returns to his position of commander.
- Thor Odinson / Thor - Thor remains a big hitter for the team, loyal as always. He returns to Asgard to stop Ragnarok from happening, gaining his father's powers when he dies. He returns to face Thanos.
- T'Challa / Black Panther - Another mainstay of the team, T'Challa is an integral member of the Avengers, spending much of the series back in Wakanda defending his throne.
- Bruce Banner / The Hulk - The team's loose cannon, Bruce has fully controlled his powers and came to terms with the Hulk, until he is shot into space and ends up in a gladiatorial arena. he returns to earth as a king with an army, looking for revenge
- Hank Pym / Yellowjacket - The deranged alter-ego of Hank Pym, Ant Man. Hank sticks to his reckless ways but comes more to terms with his mental state, with Wasp helping him redeem himself, as the two falls in love once again.
- Victor Shade / Vision - The android was a loyal and powerful member of the team, helping adjust the Maximoffs to the team, which lead him to falling in love with Wanda, much to some members' confusion.
- Wanda Maximoff / Scarlett Witch - The powerful mutant and ex-brotherhood of mutants member becomes one of the avengers' most powerful members. She also falls in love with the Vision and later has twin children who later join the Avengers.
- Pietro Maximoff / Quicksilver - The hot headed ex-brotherhood member is the cocky but good-willed speedster. He is generally distrusted in the new team, but the Vision shows him how to be a true hero.
Avengers West Coast
- Clint Barton / Hawkeye - Separated from the team, Clint heads West to find Bobbi. There he accidentally forms the West Coast Avengers and becomes their de facto leader.
- James Rhodes / War Machine - After helping Tony fight off Hammer Drones, he's sent to locate the missing Avengers, finding Clint and helping his rag-tag team defeat the Masters of Evil for good.
- Bobbi Morse / Mockingbird - reuniting with Clint, the now-retired Bobbi is pulled back into the superhero game and reconnects with her ex-lover.
- Simon Williams / Wonder Man - finally defecting from the Masters, Wonder Man joins the west coast team, helps see the good in Jocosta, and died in battle against Thanos.
- Jocasta - A female Ultron project, she is captured and reprogrammed to the Avengers' needs, with the Vision seeing the free-will within her.
- Steve Rogers / Captain America - After the team splits Steve goes to SHIELD to find it mostly destroyed by HYDRA. He's recruited to find out what happened and faces his old enemies, lead the Secret Avengers and reconnect with his old friend Bucky.
- Bucky Barnes / Winter Soldier - Bucky is once again brainwashed, but Cap helps him break free, the two friends back together again.
- Natasha Romanov / Black Widow - Black Widow follows Steve's lead and makes amends for the things she did for HYDRA.
- Sam Wilson / The Falcon - Sam connects with Bucky over both being brainwashed and becomes an integral part of the team.
Heroes for Hire
- Luke Cage, Iron Fist, Ant Man
- Professor X, Wolverine, Shadowcat, Iceman, Cyclops, Jean Grey, Beast
- Mr.Fantastic, Invisible Woman, Human Torch, The Thing
- Spider Man, Doc Sampson, Mar-Vell, Stingray, Black Knight, Hope Pym
- Odin, Balder, Loki, Sif, Heimdall, Fandral, Volstagg, Hogan, Beta-Ray-Bill
Guardians of the Galaxy
- Star-Lord, Rocket Racoon, Groot, Adam Warlock, Quazar.
- Korg, Miek, Caiera
- Children of Thanos
- Masters of Evil
- Red King
- Brotherhood of Mutants
- The six Infinity Gems are as follows
- The Mind Gem is taken for safekeeping by Mar-Vell from the supreme intelligence, leading Thanos to Earth.
- The Reality Gem keeps Atlantis hidden to the world and is taken by Emoby Maw as the Atlantians and Avengers fight each other.
- The Soul Gem is the seed of the Heart Tree in Asgard and is sacrificed to Thanos in order to defeat Surtur.
- The Time Gem is stolen from Kang in the far future by Hank and Hope.
- The Power Gem is taken by Hulk from the Red King, but stolen again by Thanos in the chaos
- The Space Gem is acquired by Thanos, leading him to invade Earth.