NBC has been leaking like a sieve for weeks, so other than a few on-the-bubble cancellations, there aren't any huge surprises in their official upfront announcement. The big change is that they're doing two official seasons. A lot of the networks have been doing this unofficially, but NBC seems to be one of the few that is putting a label on it.

Returning: Heroes, The Biggest Loser, Law & Order: SVU, Saturday Night Live, SNL: Weekend Update Thursday, Parks and Recreation, The Office, Law & Order, Southland, Dateline NBC

Returning mid-season: Chuck, 30 Rock, The Celebrity Apprentice

Gone: Life, Medium, My Name is Earl, Kath & Kim, Kings, Knight Rider

New: Trauma, The Jay Leno Show, Parenthood, Community.

New for mid-season: Day One, 100 Questions, Mercy, The Marriage Ref

Not reflected on the schedule, but will be returning in the summer: America's Got Talent, Friday Night Lights (which will once again be aired first on Direct TV).

Watch this space for more details on the new shows...

More on the schedule and comments after the jump.