One additional episode was later ordered for a 23-episode season.

Ten episodes were ordered, with production expected to begin in fall 2012.

It has also ordered 5 new episodes in addition to the original 13.

As a result, 1,040 episodes over two years were initially ordered.

But expense is only one reason networks can't order eight more episodes of a show.

Six episodes were ordered at the time of the show's announcement.

An additional 2 episodes were ordered for a 24-episode season on January 6, 2010.

An additional 3 episodes were ordered January 20, 2010 for a 25-episode season.

An additional 4 episodes were ordered January 20, 2010 for a 20-episode season.

For the first season, 11 episodes and a bonus 12th were ordered.