Otto Octavius/Doctor Octopus/Master Planner

Otto Gunther Octavius/Doctor Octopus/Master Planner

The Spectacular Spider-Man (Season Three)
After his therapy failed, Doctor Octopus was sent to the Vault and shared a cell with Montana. Molten Man melted the doors and let them out. Chameleon gave Otto his arms back and Tinkerer repaired them. He was sent with the Enforcers to guide them while taking down Spider-Man.

He guided Montana through the mission as the Master Planner, but when they failed, he repaired and returned Montana's shockwave generators and suit and Ox and Fancy Dan's armors. He then helped them by activating hidden weapons he had placed in the New Enforcers armor and acting as a guide for them and autopilot for the armors. After they failed, Harry Osborn approached him and although Doctor Octopus initially attacked him, he offered to make a deal with him: bring Spider-Man to his mansion where he would unmask and kill him and he would get tritium to power his harness, an offer Octavius couldn't refuse. Unbeknownst to Harry, he only wanted the tritium to power a reactor that would mass-produce and power Octobots.

He attacked Coney Island where Peter was taking a break from being Spider-Man and fought him there. They landed on a train and dueled of which the people were forced into a back coach while Doc Ock uncoupled part of the train, which Spider-Man jumped on and it collided with an OsCorp warehouse where Harry and Donald Menken got involved. As they flew on a helicopter, Doctor Octopus fought Spider-Man on Norman's prototype TechFlight glider, during which he accidentally tore his mask off and learned his secret identity as Peter Parker. Harry opened fire on Spider-Man with tritium bombs and Octavius was thrown into the helicopter, causing it to crash into a pier warehouse the Master Planner was using. He then used several tritium reactors to power his machine, but Spider-Man stopped him and plugged one of his arms into a wire. Doc Ock then threw three bombs at Peter, but he deflected them and they struck a power box that explodes and electrifies Octavius, causing him to become Otto Octavius again. However, it caused everything to be shut off around the reactor which caused it to begin to detonate. Otto, realizing his mistake apologized to Peter and caused the building to collapse into the lake while Peter got Harry to safety. Otto was last seen in a hospital with his arms removed and badly scarred, visited by Peter.