Helping Hands, Iron Fist - S1-E4
Factual error: When Bruce Banner sees the Hollywood sign reflected in the puddle of water, the reflection is backwards.
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: 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: 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 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.