Spider Wars, Chapter 1: I Really, Really Hate Clones - S5-E12
Continuity mistake: When the group of Spider-Men are observing the Green Goblin and the Kingpin's henchmen from inside the ventilation shaft, the outside edge of the shaft cover is first shown to be on the wall outside of the shaft, and then inside the shaft itself when the Armored Spider-Man pulls the cover off.
Secret Wars, Chapter 3: Doom - S5-E11
Continuity mistake: After the Beyonder ends the war, he teleports everyone to a floating chess board in space, with Dr. Doom lying near the edge. When the shot changes, Doom has moved closer to the middle of the board. He is unconscious so he couldn't have moved.
Secret Wars, Chapter 3: Doom - S5-E11
Audio problem: When the Lizard says "Yes, Spider-Man," his mouth is wide open and motionless.
Secret Wars, Chapter 3: Doom - S5-E11
Revealing mistake: After Dr. Doom has stolen the Beyonder's powers, he demonstrates the powers to Ben Grimm in his throne room by teleporting Red Skull, Dr. Octopus and Smythe off the planet. Next he teleports all the heroes to his throne room, and the shot of all the heroes is from two episodes prior when all the heroes were battling the Lizard. This shot of the heroes also includes Ben Grimm in form as the Thing, meaning Ben Grimm was in two places at once. Spider-Man, the Lizard and the rest of the Fantastic 4 were also already prisoners in Doom's castle, which means they were all in two places at once as well.
Secret Wars, Chapter 1: Arrival - S5-E9
Other mistake: When Spider-Man is scrolling through his options of which member of the X-Men that he can teleport to the planet, the picture of Cyclops shows part of his yellow "bandolier" colored blue.
Secret Wars, Chapter 1: Arrival - S5-E9
Continuity mistake: Towards the end of the episode, Captain America stands up to pledge his support to Spider-Man. When the shot changes, Cap is suddenly sitting down. When the shot changes again, Cap is standing up.
The Return of Hydro-Man: Part 1 - S5-E7
Other mistake: When Spider-Man catches up to Mary Jane and Hydro-Man at the foundry, he webs up Hydro-Man's left wrist. When the shot changes to Spider-Man landing, he is not holding onto the web-line. When the shot changes back to Hydro-Man, his arm his pulled with the web-line remaining taut, even though Spider-Man is not holding the web. If Hydro-Man was moving his arm on his own, then the web-line would be slack.
The Return of Hydro-Man: Part 1 - S5-E7
Continuity mistake: When Mary Jane is hiding from Hydro-Man behind the barrels, one shot shows her bare arm under her yellow sweater, when the sleeves of her purple turtleneck that she wears under the sweater should be visible.
The Return of Hydro-Man: Part 1 - S5-E7
Other mistake: When Spider-Man breaks the chain off the steering wheel of the boat, several of the links on the back loop of the chain break off, which would be impossible since he broke the chain at the front.
The Return of Hydro-Man: Part 1 - S5-E7
Continuity mistake: When Spider-Man is in the lab analyzing Mary Jane's jacket for clues, the inside of the door to to the lab has the door knob on the right side. When Debra Whitman is trying to get in the lab, the door knob on the outside of the door is on the right side as well, when it should be on the left side. The inside knob also disappears when the security guards break the door down.
Six Forgotten Warriors Chapter 5: The Price of Heroism - S5-E6
Continuity mistake: When Captain America and Red Skull are grappling near the vortex, their fingers are interlocked. When the shot changes, their hands are pushing against each other's torsos.
Six Forgotten Warriors Chapter 5: The Price of Heroism - S5-E6
Other mistake: Two scenes in this episode are shown out of order. First we see Captain America and Spider-Man lying on the ground near the dimensional vortex at the mercy of Chameleon and the Red Skull, with Cap flicking a rock across the room to distract Chameleon so that he and Spider-Man can re-engage them in battle. Shortly after, we see Spidey and Cap arriving at the dimensional vortex to configure it to defeat Electro, with Chameleon and Red Skull attacking them once Spidey has finished with the vortex, revealing they had been lying in wait knowing full well someone would figure out that the vortex was the key to stopping Electro.
Six Forgotten Warriors Chapter 5: The Price of Heroism - S5-E6
Continuity mistake: When Captain America is giving Spider-Man moral support after Mary Jane's accident on the roof, the red glove on his right hand briefly turns blue when he puts his hand on Spider-Man's shoulder.
Six Forgotten Warriors Chapter 5: The Price of Heroism - S5-E6
Other mistake: When Spider-Man and Silver Sable are chasing the Red Skull and Kragov, they are able to deduce which direction they are going by identifying their footprints. However, Spidey and Silver Sable themselves don't leave footprints when walking over the same spot.
Six Forgotten Warriors Chapter 4: The Six Fight Again - S5-E5
Character mistake: When the Red Skull reemerges from the vortex, he sees Chameleon and acknowledges him as his stepson. However, only moments before this, Kragov explicitly stated that the Chameleon was more like an adopted son to the Red Skull.
Six Forgotten Warriors Chapter 4: The Six Fight Again - S5-E5
Audio problem: When Dr. Groitzig is saying "It's been so many years," he has his fingers in his mouth. While it's possible to speak with fingers in your mouth, your voice will sound quite different when doing so, and Groitzig's voice sounds normal.
Six Forgotten Warriors Chapter 2: Unclaimed Legacy - S5-E3
Other mistake: When Silver Sable infiltrates Kingpin's Russian lair with sleeping gas, before falling unconscious, Kingpin correctly deduces that he has been betrayed. In the next scene, Kingpin asks Silver Sable how she was able to infiltrate his lair, and she tells him one of his men is a traitor, which elicits an incredulous reaction from Kingpin, completely contradicting the previous scene where Kingpin already surmised there was a traitor.
The Wedding - S5-E1
Other mistake: When J. Jonah Jameson is on the phone with Wilson Fisk, one shot shows that the area of Jameson's desk between the receiver and the cord is colored the same gray color as the cord, instead of the golden-brown color the rest of the desk is.
Partners in Danger Chapter 10: Lizard King - S4-E10
Plot hole: When Debra and Margaret arrive at the underground arena with the device that can revert the humanoid lizards to their original forms, they lose control of the device and it ends up in the hands of Ghila, who monologues that the humanoid lizards' existence was an accident and that she will use the device to return them to being regular lizards. Ghila had never seen this device before, nor did anyone tell her what its purpose was, so there's no way she could have known it was designed to reverse the mutations.
Partners in Danger Chapter 9: The Haunting of Mary Jane - S4-E9
Plot hole: Miranda Wilson states that after the accident on the movie set left her face disfigured, she hid in the catacombs by the bridge and almost died from her condition until Quentin Beck found her after he was released from prison. Beck is the one that caused the accident in the first place, so even if he only spent a month in prison, Miranda Wilson would have died from starvation or malnutrition - if not infection from her untreated facial disfigurement - long before Beck could have been released from prison and found her.
Answer: In the comics, Hobgoblin's true identity was kept a mystery for a long time intentionally and while many fans deduced it was Kingsley, and creator Roger Stern was leaning that way, Stern left the series in 1984. In 1987 Hobgoblin's identity was revealed to be Ned Leeds and then Macendale became Hobgoblin. It wasn't until 1997 that Sterns wrote the mini-series "Hobgoblin Lives" and retconned Kingsley as the original Hobgoblin.
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