LOS ANGELES (thefutoncritic.com) -- NBC Entertainment chief Robert Greenblatt made it official this morning: "30 Rock" is entering its final season this fall.

The news comes after the executive told reporters "we haven't definitively said that" yesterday during the Peacock's pre-upfront press call. In any case, the show's 13-episode swan song will close with a one-hour finale.

Other notable developments from today's presentation:

-- "The Voice" will launch its third season on Monday, September 10, the night after the NFL kicks off its Sunday night schedule with the Pittsburgh Steelers at the Denver Broncos. The Peacock also plans to preview various comedy pilots during its Olympics coverage however no specifics were given.

-- "Crossbones," formerly known as "The Republic of Pirates," has just received a straight-to-series commitment. The period drama, to be overseen by "Luther" creator Neil Cross, has been in the works since June. Greenblatt likewise made a point to mention "Mockingbird Lane," its reboot of "The Munsters," will film its pilot next month for potential midseason consideration.

-- And finally, Greenblatt indicated "Rock Center With Brian Williams" will make the move to Thursdays this summer in advance of its fall rollout. No hard date however was indicated.

We've likewise confirmed the following developments:

-- Rick Wiener and Kenny Schwartz ("American Dad!") have been tapped as executive producers of newcomer "Guys With Kids" while Sara Colleton ("Dexter") and Jesse Alexander ("Heroes") have also been added as executive producers on "Hannibal." Last week, the Peacock landed deals with Alexa Junge to run "Save Me" and Gail Lerner to oversee "Animal Practice."

-- The role of Julian Bowers on the midseason drama "Infamous" is being recast. Neil Jackson played the character - the sweet, sexy, bad boy, sex-addicted youngest son - in the original pilot. The news marks the second recasting at the Peacock thus far, the first being Amy Huberman on fellow newcomer "Animal Practice."

-- Press materials also indicate Lamman Rucker's role on new comedy "Save Me" is presumably being recast while Betsy Sodaro is listed as a series regular on "Animal Practice."