The network demanded last night that the material held by the F.B.I. be returned.

Previously a network could demand any time it wanted from an affiliate.

The Syrian network for human rights demanded "an immediate international investigation for this massacre."

Three years ago, the four networks demanded cash compensation from cable operators for the rights to use their programming.

Federal legislation that was passed last year allowed the networks and other broadcasters to demand cash from cable operators for their broadcast signals.

Though the creators wanted to include an image of Muhammad in the episode as part of its message, the network ultimately demanded it censored.

"There was no point in doing this subject in the earnest, balanced way that the networks would have demanded," Mr. Thomas said.

As we refine the ratings of commercials, can it be very long until the networks are demanding the most popular ads?

Currently all three networks demand that producers of a new series give them the option to renew the program for four years.

However, the network only partially agreed and demanded that Bridger would make several appearances throughout the third season.