Apple said Thursday that it has sold 200 million TV episodes on iTunes. The company announced this morning that a number of networks have added HD content to iTunes, completing the circle of the four major networks here in the US offering HD TV downloads: ABC, CBS, FOX, and NBC now all have primetime shows on iTunes.

iTunes now carries more than 70 primetime shows from major broadcast networks. As far as pricing is concerned, high-definition shows are $2.99 per episode with a discount per whole season bought. Standard definition shows remain $1.99 each. And for these prices everything from CBS’s “CSI: Miami” and its New York-based variant to FOX’s “Prison Break” to NBC’s “The Office” to ABC’s “Desperate Housewives” and “Dirty Sexy Money” is available.

"We've got an incredible Fall 2008 TV lineup with over 70 primetime comedies and dramas, including many of the most popular shows on TV in stunning HD," said Apple's VP for Internet Services Eddy Cue, in a statement. "With over 200 million episodes sold, iTunes customers have proven they love watching television on their computer, iPod, iPhone and TV with Apple TV."

But this is far from being a big deal, though. Because Apple has had to contend with the extended removal of NBC programming for much of the last year, its sales have presumably not been as superb as they might have otherwise been. Competition with iTunes will continue to be strong with players like Netflix, but very few distributors such as iTunes and Amazon Video on Demand being the most prominent of all.