Netflix has sealed a deal with NBC Universal to begin offering online episodes of Heroes. The episodes will appear on Netflix's website the day after they air on NBC.

Under the agreement, Netflix subscribers will also be able to view past episodes of other NBC series, including 30 Rock, Friday Night Lights and The Office, via rented DVD or on Netflix's website.

According to Netflix content acquisition VP Robert Kyncl, the deal is part of a larger effort to start offering more TV content on its website. Currently, about 20% of the company's traditional DVD rental business consists of TV properties; Netflix is looking to assign the same percentage in the digital space.

"Netflix's aggregate content on DVD right now is 90,000 individual titles," Kyncl said. "My mandate is to continue increasing the availability of the same content in digital. We currently have 5,000 titles available. Our goal is to increase that in order to offer our subscribers multiple delivery options."

For NBC, the Netflix deal is the third prong in its off-network Heroes strategy, which gives the online movie rental service the exclusive subscription video-on-demand rights to the show.

"This deal reflects the changing landscape of the entertainment marketplace and our objective of finding new buyers that complement our traditional customers," said NBC Universal Domestic Television Distribution exec VP-general sales manager Frances Manfredi.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.