Ready for the new TV season? NBC is out of the blocks first, sprinkling previews of seven of its new shows into the schedule between now and when the season officially starts in three weeks. We review two of these early birds below, as well as a Saturday morning show that gets prime-time exposure this week. We’ll catch up with the rest as they air. NBC is really sticking it to the competition with this cutthroat preemptive strike. I like that in a network.