NEW YORK — David Letterman, who said goodbye to his talk show two years ago, will say hello to TV again with a new show for Netflix.

Netflix announced Tuesday that the six-episode series has Letterman combining two primary interests: in-depth conversations and in-the-field segments sparked by his curiosity and humor. In each hour-long episode, Letterman will conduct a long-form conversation with a single guest and explore topics of his own outside the studio.

The series, not yet titled, is set to premiere in 2018.

Letterman’s 33 years on late-night television make him the longest-running late-night broadcaster in American history.