Continuity mistake: When Dark Hulk arms the nuclear warhead, the orientation of the timer is the same as the control buttons. When Banner disarms the warhead, the orientation of the timer is now upside down respective to the control buttons. (00:18:00 - 00:20:26)
Continuity mistake: After the alien entity has been purged from Bruce Banner's body, he is on all fours and tilts his head back, with the warhead behind him. When the shot changes, his head is pointing forward again and the warhead is now directly in front of him. (00:20:15)
Continuity mistake: When the alien entity transforms Bruce Banner's body into a purple-skinned Hulk, his hair also turns black. When the shot changes, his hair is back to being brown.
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 ★