This is the final month of the regular TV season among the networks, which means it's an important time for shows on the bubble.
With four or five episodes left for each series, how a show performs heading into May sweeps could decide whether or not it makes next year's schedule.
Of course, which network a series is aired upon will also make a difference. Lightly rated series like "Heroes" and "Chuck," which have a core fan base, have a better shot at being renewed because they are on lowly NBC than better-rated series like "V" and "FlashForward" do on ABC because frankly, NBC needs anything with any sort of fan base.
(It doesn't help that ABC's marketing and programming department handicapped "V" and "FlashForward" by changing over creative staffs and keeping the shows off the air for more than three months).
So, if there's a series that you are worried about, pay close attention over the next month to the ratings -- and hope the producers don't end the season on a cliffhanger.
'TRUE BLOOD' MINISODES: HBO kicks off today minisodes for "True Blood," set to return in May.
The minisodes feature regular members of the cast and the short films, available for download at hbo.com, link events from the end of Season 2 to the beginning of the upcoming Season 3.
TUESDAY'S BEST BETS: It's not what's on tonight but rather what isn't -- "Lost" is a rerun, though it's likely the best episode of the season thus far -- the one that tells us Richard's backstory. It's followed by a new "V" at 10 p.m.
CBS has all-new episodes of "NCIS," "NCIS: LA" and "The Good Wife," all of which are assured to be back on next year's schedule. But why did "NCIS: LA" add the blond male cop to the team? It's not like we know much about the established cast and now they add an extra one?
NBC has two hours of "The Biggest Loser," followed by a new "Parenthood" at 10 p.m.
"Glee" is supposed to begin at 9 p.m. on Fox, but who knows how long "American Idol" will run this week? So set your recording devices to go long, just in case, especially since the always delightful Kristin Chenoweth is back.
The CW has a new "90210" at 8 p.m.
On cable, there's a new "Law & Order: Criminal Intent" (USA. 10 p.m.), plus the season finale of "Survivors" (BBC America, 10 p.m.)