Complex sentence: Electric Eve and Litterbug destroyed the main computer, sending the Sentinels out of control, and they Morlocks fled, but Cell ran back in, determined not to let the Project Director, Dr. Metellus, have another chance to harm his friends.
Split into simpler sentences: Electric Eve and Litterbug destroyed the main computer, sending the Sentinels out of control, and the Morlocks fled. However, Cell ran back in, determined not to let the Project Director, Dr. Metellus, have another chance to harm his friends.