When Oprah Winfrey's magazine was in trouble, she boosted sales by becoming the full-time cover girl. So it should come as no surprise that when the ratings for her new network started to sag, she called on her most reliable weapon: Herself. "Season 25: Oprah Behind the Scenes" (7 p.m., OWN) explores the host's trip to Australia, followed by "Oprah Presents Master Class" (8 p.m., OWN) with special guest ... Oprah Winfrey.Monday 3/28
"Nurse Jackie" (9 p.m., Showtime), which starts its third season, has an ongoing problem -- and I'm not talking about a drug addiction. Edie Falco continues to live up to her Emmy win in the title role, but the rest of the cast just doesn't have enough to do. The one exception: Merritt Wever, who manages to mine laughs by simply skipping into the scene. A few more juicy story lines for the supporting players would do wonders for this show's health. The return of "The United States of Tara" (9:30 p.m., Showtime) follows.Tuesday 3/29
It's the premiere of "Body of Proof" (9 p.m., KSTP, Ch.5). Finally. This drama about a crusading coroner has been on the shelf so long, it should be as cold as a corpse. Fortunately, Dana Delany is a bona fide star who brings life to her brittle character, which is best described as "House" in heels. Delany breaks down a few too many times in the pilot, but I have a hunch that tougher skin and tougher story lines are just around the corner.Wednesday 3/30
This may be the season finale of "Top Chef: All Stars" (9 p.m., Bravo), but don't fret; "Top Chef: Masters" comes back April 6. (Those who know the difference between the two should treat themselves to a fancy French meal.) I'm glad to see the franchise doing well, but the way the Bravo network is going, I fear the possibility of "Housewives of Top Chefs."Thursday 3/31
Now it's McDreamy's turn. "Grey's Anatomy" (8 p.m., KSTP, Ch. 5) picks up on the musical trend with an episode featuring singing-and-dancing doctors. Look for the cast to warble songs that are show staples, like "Chasing Cars," "How to Save a Life" and "The Story." Coming soon: Steve Kroft and Lesley Stahl contribute to a musical rendition of "60 Minutes."