Helping Hands, Iron Fist - S1-E4
Continuity mistake: Early in the Hulk's fight with Iron Man, he punches Iron Man onto the hood of a red car and then throws a blue car at him. Iron Man disappears from the screen as soon as the blue car hits the red car, and then can be seen either back on the hood, or instantly inside the car. If he is still on the hood, then he disappears from the screen once again when Hulk throws the car.
Helping Hands, Iron Fist - S1-E4
Continuity mistake: When Hulk punches Iron Man into the bus, Iron Man is shown landing through the roof in the middle third of the bus on the driver's side. When the shot changes to Iron Man inside the bus, the hole in the roof is now shown to be down the center of the bus and closer to the front.
Continuity mistake: When the Hulk lands in the streets of Chicago after his battle with Ghost Rider, he is in the middle of the street. When the shot changes, he is suddenly next to the curb and a mailbox.
Man to Man, Beast to Beast - S1-E6
Continuity mistake: When Dr. Langkowski climbs into the large test tube to run the experiment on himself and Banner, he uses a hatch wheel to seal his tube closed. When the shot changes, the wheel has disappeared.
Man to Man, Beast to Beast - S1-E6
Continuity mistake: When Taylor discovers Sasquatch's footprints in the snow, they have no toe prints. When Taylor's father finds the same footprints, they now have toe prints.
Man to Man, Beast to Beast - S1-E6
Continuity mistake: When Dr. Langkowski is talking about solving the mystery of gamma mutation in humans, a couple pens appear in his shirt pocket.
Helping Hands, Iron Fist - S1-E4
Continuity mistake: After Rick Jones finds Bruce Banner among the overpass wreckage, Bruce starts transforming into the Hulk and grabs some gray rubble, which immediately turns the same color as his flesh.
Helping Hands, Iron Fist - S1-E4
Continuity mistake: When Rick Jones is hanging on to the containment unit that the Hulk is trapped inside, at one point the Iron Man gauntlet that he borrowed switches from his right hand to his left.
Helping Hands, Iron Fist - S1-E4
Continuity mistake: When Doc Samson is carrying the cylindrical tank for the nutrient bath, he is holding it from the bottom rim. When the shot changes, he is holding it from the outside.
Continuity mistake: When Talbot arrives to attack Hulk, he is wearing a hat. When he falls out of the helicopter, the hat is missing. When he lands on the roof, the hat is back on his head.
Continuity mistake: When Doc Samson throws Hulk through the train station, it is a wooden building. When Hulk crashes out of the back side, it is now a brick building.
Continuity mistake: When Hulk jumps up onto Talbot's helicopter, it changes color from an army green to blue.
The Return of the Beast: Part 2 - S1-E2
Continuity mistake: When the Leader is preparing to force Banner to transform into the Hulk, he shoots Gargoyle in the left shoulder with a blaster for being insolent, which leaves a hole in the corresponding area of his clothing. Moments later, the hole has disappeared.
The Return of the Beast: Part 1 - S1-E1
Continuity mistake: When General Ross is warning Banner that he is not bulletproof, an armed guard is flanked on either side of Banner. When the shot changes, the guard on Banner's left had suddenly moved several feet away.
The Return of the Beast: Part 1 - S1-E1
Continuity mistake: When Rick is telling his boss that he needs to leave work to help out a friend in a jam, he is standing next to the payphone, and when the shot changes, he is already several feet away sitting on his motorcycle and putting his helmet on.
Answer: I believe it was mentioned in an issue of Wizard Magazine that the show was cancelled because of low ratings, and reportedly the show's creative shift in the second season had a part to play in the low ratings, as the changes alienated fans.
Phaneron ★