Ultimately journalism has changed... partisanship is very much a part of journalism now.

Broadcasting for advertisers is still the best game in town, and they know it. Look, I admire a lot of the shows on cable. I think 'Mad Men' is wonderful. I think 'Breaking Bad' is wonderful. But let's remember they're about one-tenth the audience of NCIS.

The stories about broadcast dying or it being overtaken by cable have stopped. Same goes for the stories about the Internet hurting our business.

I understand why creative people like dark, but American audiences dont like dark. They like story. They do not respond to nervous breakdowns and unhappy episodes that lead nowhere. They like their characters to be a part of the action. They like strength, not weakness, a chance to work out any dilemma.

I take great pride in all the tremendous success we've enjoyed at CBS. And the good news is that I feel even more enthusiastic about what my terrific team and I will accomplish going forward.

CBS is proud to have been the home of David Letterman since 1993. He is truly one of the great talents of our time, and we hope things work out.

You won't see Moonves on Twitter.