NBC replaces sitcom block with special two-hour 'The Biggest Loser'

NBC's sitcom "20 Good Years" is coming to an end one week earlier than expected and is being replaced with a 2-hour edition of "The Biggest Loser."

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The 2-hour special will also displace comedy "30 Rock," which is being moved to Thursday nights, MediaWeek.com reported Monday.

The Wednesday night slot planned for "20 Good Years" and "30 Rock" will be temporarily filled with repeats and specials.

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NBC has also cut the order of their upcoming sitcom "The Singles Table," which revolves around a group of single young adults who form a friendship after sitting together at a wedding, from 13 episodes to six episodes.