NBC will probably end the season as the second most-popular network behind CBS , which is first among the key 18-to-49-year-old demographic .
NBC will probably end the season as the second most-popular network behind CBS , which is first among the key 18-to-49-year-old demographic .
NBC will probably end the season as the second most popular network behind CBS , although it 's first among the key 18-to-49-year-old demographic .