2016 Marvel's Ultimate Spider-ManSeason 4: vs the Sinister 6Destiny
First episode: 2016-02-21Last episode: 2017-01-07
Peter Parker finds himself in prime position – he’s a successful hero after fighting alongside The Avengers, a S.H.I.E.L.D. Academy leader and has a great relationship with his Aunt May. However, when Spidey discovers that his greatest enemies – Doctor Octopus, Hydra and the all-new Sinister 6 – have teamed up to destroy him and S.H.I.E.L.D., he creates a special new team of Spiders.
Episodes

Peter Parker learns Doctor Octopus has teamed up with Arnim Zola and Hydra to attack the Tri-Carrier, leaving S.H.I

After being saved by Scarlet Spider following Arnim Zola's takeover of the S.H.I

After learning that Norman Osborn injected himself with an Anti-Goblin serum to prevent further transformations into Green Goblin following the last encounter, Doctor Octopus teams up with Baron Mordo and uses the Siege Perilous to pull the Ultimate Green Goblin from Miles Morales' universe into theirs so that HYDRA can be his master. Now Spider-Man and Miles have to work together with Doctor Strange to keep the demonic Goblin from using the Siege Perilous to destroy reality

With the Siege Perilous destroyed in the aftermath of the fight with the Ultimate Green Goblin, Miles Morales is forced to stay in Spider-Man's reality until S.H.I

Dr. Curt Connors has been turned into Lizard again. This time, he has a bite that turns anyone who is bitten into Lizards

After Doctor Octopus and Rhino have escaped the Triskelion with Agent Venom in their clutches, Spider-Man and Scarlet Spider track them to the recently-returned HYDRA Island as Doctor Octopus and Arnim Zola work to separate the Venom symbiote from Flash Thompson. In order to get to Flash, Spider-Man and Scarlet Spider have to fight their way past Kraven the Hunter and the HYDRA Agents. Ock Manages to succeed in separating the symbiote from Flash, giving to Kraven, who becomes a lion-like Venom

Spider-Man, Iron Spider, Agent Venom, Kid Arachnid, and Scarlet Spider have been looking for signs on where Doctor Octopus is hiding out. Upon Spider-Man and Iron Spider being ambushed by Vulture, they follow him to a nearby island where they are attacked by clones of Sandman. As Spider-Man fights the Sandman clones, Iron Spider stumbles upon a secret laboratory where Doctor Octopus has captured Sandman and cloned him so that he can find the "Ultimate Sandman" that will join the Sinister Six

Spider-Man and Agent Venom have been busting villains like Beetle, Grizzly, Shocker, and Shriek where they suspect that they might be candidates for Doctor Octopus' Sinister Six. Arnim Zola recruits Michael Morbius to work on a new symbiote. When Spider-Man, Agent Venom, and Harry Osborn in the Patrioteer armor track them down, they are caught off-guard when they release the Anti-Venom symbiote which possesses Harry and does not have any of the symbiote weaknesses

During a drought, Spider-Man, Iron Spider, Kid Arachnid, and Scarlet Spider answer a distress signal that takes them to an abandoned mall in Queens. They find an empty air-tight room containing Hydro-Man who has a past with Nick Fury. While transporting him to the Triskelion, Iron Spider find that Hydro-Man is not a good guy where the fight with him causes an emergency landing near Aunt May's house

Spider-Man faces the culmination of all Doc Ock's evil machinations when the new Sinister Six assaults the Web Warriors and S.H.I

When Doc Ock learns that the key to a device that will retrieve Hydra Island is at Aunt May's house, Spider-Man must fight to protect his family

When a battered Nova asks for help finding Nick Fury, Spider-Man tracks him to the dangerous ruins of an ancient city

Spider-Man and Agent Venom discovered Hydra and Morbius' plan to create a new and improved Venom Bomb

Spider-Man, Captain America and S.H.I

Spider-Man and his fellow heroes have to Morbius and his plan to use the Carnage Queen as a weapon

Spider-Man and Kid Arachnid travel to alternate dimensions to gather the shards from the broken Siege Perilous

Spider-Man and Miles, tracking the missing pieces of the Siege Perilous, travel to a tropical Pirate dimension where they meet Web Beard, the Spider-Pirate, and encourage him and his old team to work together to save themselves from the dreaded Kraken

Spider-Man and Kid Arachnid arrive in the Noir Universe where they have to prevent Mr. Negative from using the Siege Perilous to drain all the life and color out of the world

Spider-Man, having collected all of the shards of the Siege Perilous, returns to Miles Morales' universe and confronts Wolf Spider

Trick-or-treaters start turning into monsters and Spider-Man, Dr. Strange and Ant-Man must team up to stop Baron Mordo

Spider-Man must team with the former traitor, Scarlet Spider, to stop Doc Ock from reawakening a secret program designed to create evil duplicates of Spider-Man

Spider-Man and Scarlet Spider have to infiltrate the sunken Hydra Island so Scarlet can destroy the lab that created him

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Spider-Man puts the Triskelion on lockdown when a mysterious villain begins to take out the heroes one at a time

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Spider-Man house sits on Christmas Eve and is forced to team up with Moon Knight to defend the home from the new Mysterio

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Spidey must track down Ock before he harms Aunt May

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Peter Parker must find a way to stop Doctor Octopus and the Superior Sinister Six from destroying all of the heroes in New York and taking over the world