‘Tis the season to be anxious — or at least it is for obsessive TV fans. Yes, folks, at this very moment, network executives are pondering their 2011-2012 lineups, closely monitoring their pilot development slate, and examining the latest ratings data to determine which existing series will return for another go-around.

Here at TVLine, we’re keeping track of all your favorite “on the bubble” shows with our regularly updated Renewal Scorecard feature, but we also thought it would be fun to put you in the role of network exec to find out which at-risk show most deserves an extended lease on life. And thus we created the first annual “Renew Our Show!” Sweet 16 Bracket Tournament, a single-elimination duel to the death among 16 yet-to-be-renewed favorites. We left out series that are total certainties to get picked up (hi, Criminal Minds, Supernatural, and Community!) as well as those to which the Grim Reaper has already paid a visit (adieu, Running Wilde!). Every weekday at 1 p.m. ET for the three weeks, you can vote in polls to help narrow down the field. Click here to see the entire bracket (then click again on the image for a zoomed-in view).

Today, we’re kicking things off with a flurry of fists, gunshots, and occasional disguises, as the super-spies from NBC’s Chuck and Fox’s Human Target face off. Polls will be open for 72 hours, so pick your poison, then hit the comments to justify your vote, and head to Facebook and Twitter to rally more fans to your favorite. And to get alerted to all future “Renew Our Show” showdowns, follow me on Twitter @MichaelSlezakTV. Ready, set, vote!