Today’s longest reigning talk show host, whose career began when he took over the David Letterman slot as an unknown 28 years ago, grew a unique style and was Named “Tonight” show host before his slot was rescinded, found a home on cable TV for the past 11 years. But now, Conan O’Brien is calling it quits after tonight’s special, hour long “Conan” (TBS, 11 p.m.) featuring his final guest, Jack Black. Anything can happen; on Tuesday’s show he smoked pot with Seth Rogen. The Bostonian isn’t retiring; he’ll be developing a new show for HBO Max. 

The first of two big documentaries on Jeffrey Epstein’s sidekick starts today. “Epstein’s Shadow: Ghislaine Maxwell” (Peacock, streaming) is a three part documentary series. “20/20” does its own reporting Friday. 

“The Good Fight” (Paramount+, streaming) returns for its 10-episode fifth season, on which Mandy Patinkin has become a series regular. 

The Japanese series “The Naked Director” (Netflix, streaming) returns for its second episode. 

Remixing nature films with humorous voice-overs is the premise of the new “When Nature Calls with Helen Mirren” (ABC, 8 p.m.), based on a British format. 

The amusing craft competition “Making It” (NBC, 8 p.m.), hosted by Amy Poehler and Nick Offerman, returns for a third season. 

The star of “Wonder Woman” presents a half dozen real life women doing extraordinary things on the new “IMPACT with Gal Gadot” (National Geographic, 10 p.m.).