The guide to the fourth season of Marvel's highly anticipated animated series The Avengers: Earth's Mightiest Heroes! which aired its first season on Disney XD in October 2010 and concluded the season in April 2011. A second season aired in April 2012 concluded in September 2012. The third season which is the start of the series continued by fans, who feel the series was untimely cancelled, can be found at The fourth season will run from September 2012 to January 2013 and will consist of 26 episodes.

Plot == Season Four follows the Avengers facing the return of old villains such as A.I.M and HYDRA. New members will join the team's roster and the foundation of the team will be shaken to its core. This season like season 3 will see longer story arcs compared to that of Seasons 1 and 2. Galactus, who was sent into negative space by the Avengers, will signal his return to the series. Also, Thor will reveal the events of Age Of Apocalypse to the rest of his team.

Season 4: (2013)

No. # Title Synopsis Original air date
1 73 A Hulk Of Another Color

The Avengers receive a distress call from Hulk's ID card and come to his aid, but what they find may be the most sinister creature to ever live.

Introducing Character: Carnage

September 2, 2013
2 74 A Sinister Plan After barely defeating Carnage-Hulk, the Avengers imprison him inside 42. Little do the Avenger's know but that is exactly what Carnage wanted. September 5, 2013
3 75 Goodbye Old Friend

The Avengers respond to a distress call at 42 to discover that the base has been over run by Symbiotes. They are barley able to escape back to Earth and they decide that the gate to 42 must be destroyed and they must say goodbye to Bruce Banner.

September 8, 2013
4 76 Red, White And Blue

With the Avengers away on Hala, visiting the Kree homeworld, Red Skull and HYDRA attack the city. But Captain America, who stayed behind, enlists the aid of Wolverine and Winter Solider to put an end to the Red Skull once and for all.

September 11, 2013
5 77 An Iron Defeat

While during a battle with Mandarin, Iron Man suffers severe damage to his suit and he is forced to battle against his deadliest foe hand to hand.

September 14, 2013
6 78

Fight For Wakanda

While the Black Panther was on Hala with the Avengers, a group of citizen's revolted against Wakanda and imprisoned Panther when he returned. Storm visits Wakanda to see her old friend finds out of the wrong doing and must work to save Black Panther, herself and the people of Wakanda from the evil Baron Zemo.

June 8, 2013

7 79 Thurst Through Time

Tony Stark and Peter Parker are working together to make modifications to the Ark reaction that powers Stark Tower, when a fail safe left by Kang The Conquerer is activated that thrusts Parker and Stark 86 years into the future, where they meet their decendents, while avoiding capture by Alchemex.

Introducing Characters: Andros Stark and Miguel O'Hara

June 10, 2013
8 80 A Second Attempt

The Leader and Abomination once again kidnap wasp to harness her power to open a time gateway, but before they can even hook her to the machine Thor and Hawkeye make the save. Back at Avenger's Mansion Thor reveals the events of what could have happened were they successful in activating the device.

June 11, 2013
9 81 Return To Asgard

Thor returns home to find that Odin has perished in battle with Surtur. Thor vows to hunt him down, before he does so he is convinced to take the OdinForce and become the new Ruler Of Asgard. But before that can happen Thor and Sif must defend Asgard from an Army of ice giants.

June 14, 2013
10 82

Doctor Who?

A strange being from a place called the dark dimension arrives and claims to be the new ruler of the planet. The Avenger's quickly go battle against him, but fall short due to his magical ability. Doctor Strange comes to their aid and helps to defeat the Dark Dimension being known as Dormammu and to send him back where he came from.

Introducing character: Dormammu and Doctor Strange

June 15, 2013
11 83 The Cosmic


A mysterious silver man appears who challenges the Avengers and warns them of the return of Galactus.

Introducing character: Silver Surfer

June 21, 2013
12 84 Tales Of The Past

Captain America tells a story about his teaming up with Wolverine and battling against the Red Skull during WW2.

June 22, 2013
13 85


S.H.I.E.L.D bases all over the world are attacked and the Avengers split up to try and put and end to the threat.

June 24, 2013
14 86 Divided They Fall

After attacking S.H.I.E.L.D bases and subduing most of the Avengers, Dr. Doom enacts the second phase of his sinister plan.

June 25, 2013
15 87 United They Stand

The Avengers regroup and take the fight to Doctor Doom and put a stop to his sinister plan.

June 26, 2013
16 88 Rampage

A portal to the Negative Zone opens above Las Vegas and Carnage-Hulk returns to Earth and rampages throughout the city, killing hundreds. Will the Avengers be able to save Hulk or have to do the unthinkable to save a friend?

June 28, 2013
17 89 Battle With The Demon

Thor, having received the full power of the Odinforce, goes after Surtur to seek revenge for the death of his father.

June 29, 2013
18 90 A.I.M Gets Stung

Wasp and Yellowjacket must overcome the odds against A.I.M after the other Avengers went to aid through in his battle with Surtur.

June 30, 2013
19 91

The Fate Of The Nine Realms: Part 1

The Avengers come to the aid of Thor to battle Surtur.

July 1, 2013
20 92 The Fate Of The Nine Realms: Part 2

The Avengers once again seek the aid of the peoples of the nine realms in the finale battle against Surtur.

July 4, 2013
21 93 Age Of Apocalypse After the battle with Surtur, Thor reveals to the Avengers and the X-Men that the Age Of Apocalypse is coming to Earth in a matter of time.