After years of discussing climate science with experts during his tenure as host of "The Late Show," David Letterman is using the topic as the centerpiece for his return to television.

Producers for the second season of the Emmy-winning docuseries "Years of Living Dangerously," have announced that the 68-year-old will host one of the eight episodes set to air next fall on the National Geographic Channel.

"It's thrilling to have him do this — we're beyond excited," producers Joel Bach and David Gelber told The Hollywood Reporter. "The reason why Letterman's part of this is that we just noticed that he seemed to perk up when this issue came across his lap. We reached out to him to see if he'd want to be part of this, and he said, 'Absolutely.' He said [that climate change is] something he does think about a lot."

According to Gelber, Letterman will soon fly to India to speak with Prime Minister Narendra Modi about the nation's energy concerns. India is aggressively pursuing renewable energy options, with the nation's solar industry alone expected to grow by 250 percent this year.

"Dave will be a terrific correspondent for us," added Gerber. "We're very comfortable having him with the prime minister of India — I'm not sure there are that many people we'd be comfortable setting up in that kind of role. He's a wonderful interviewer."

Just like season one on Showtime, this follow-up run for "Years" will come fully loaded with familiar faces, including Jack Black, Ty Burrell, Cecily Strong, Don Cheadle, Arnold Schwarzenegger, Olivia Munn and Ian Somerhalder. Director James Cameron, who serves as an executive producer on the series, will also make an appearance as a correspondent.

The second season will air in October 2016.

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