David Letterman returns to TV to talk about solar power

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David Letterman will return to TV this month for the first time since his departure from “The Late Show” in 2015.

He will appear in the National Geographic Channel’s climate-change documentary series “Years of Living Dangerously.”

In the episode titled, “Into the Light,” Letterman interviews Indian Prime Minister Narendra Modi. Letterman is a big proponent of clean energy, and his conversation with Modi focuses on how one of the world’s largest populations is making the move from non-renewable energy to solar power. The episode will air on October 30.

Letterman retired from “The Late Show” on CBS after hosting late night television for 33 years.