Discovery Channel has joined Comcast’s technical trial of On Demand Online (aka TV Everywhere).

On Demand Online gives video subscribers online access to cable network programming that is otherwise not available except through a pay-TV service.

Beginning this week, Comcast customers participating in the trial will be able to view the series “Man vs . Wild” and “Swords” the day after those shows air on TV, along with past episodes of “Storm Chasers.” “Verminators” episodes will be available a week after television airing.

Bill Goodwyn, president of domestic distribution and enterprises for Discovery Communications, hit all the key elements of why On Demand Online might provide a sustainable economic model for the pay-TV industry: “Building on our long-standing relationship with Comcast, we are pleased to participate in the On Demand Online trial to create an online viewing solution that appeals to growing consumer demand for convenient access to their favorite programs while continuing to drive value for distributors, programmers and advertisers alike,” Goodwyn said.

He continued: “We are excited to give fans of our shows more options to see our high-quality programming, and this trial represents an important next step in those efforts. We are also committed to working with Comcast and across the industry to develop a consistent online model for consumers and a meaningful way to measure viewing across platforms.”

Comcast said Discovery Channel is the 24th network to join On Demand Online. Others include HBO, CBS, TNT, TBS, Starz, Cinemax, A&E, AMC, BBC America, DIY Network, Fine Living Network, Food Network, Hallmark Channel, HGTV, History, IFC, MGM Impact, Sundance, WE tv, E!, The Style Network, G4 and Fearnet.

Comcast began its technical trial of On Demand Online with approximately 5,000 customers.