Shark will swim again -- at least for the rest of this season. The future, however, remains unclear. CBS today announced that Shark will return on April 29 in a new timeslot. The network is switching the L.A. legal drama from Sundays at nine to Tuesdays at nine, where it may benefit from the strong lead-in of NCIS. Chances are that if Shark holds NCIS's ratings -- or improves on them -- that could mean more Shark for fall. If the show stumbles, CBS will likely pull the plug.Fans of Shark may need to get more militant if they want to keep the show on the air. In a recent story we did about CBS renewals, there was fervent outcries for bringing back Moonlight and The Unit, even Cane. Out of 40 comments, only two came to Shark's defense. It may be a small sample, but still...











