Conan O’Brien has reunited with old “Late Night” sidekick Andy Richter, who’s set to star in O’Brien’s new NBC pilot “Andy Barker, P.I.”

Also Monday, Travis Fimmel (“Tarzan”) and Eric Roberts (“Less Than Perfect”) were set to star in the Fox organized-crime drama “Southern Comfort.”

O’Brien and former “Late Night” scribe Jonathan Groff penned “Andy Barker,” which stars Richter as an accountant who sets up shop in a mini-mall and fails to conjure up any business — until a woman mistakes him for the private eye who used to inhabit his office. After that, Richter’s character stumbles his way into the world of detective cases.

NBC Universal TV Studio and O’Brien’s Conaco shingle are behind the single-camera comedy pilot.

Project will also star Amy Farrington (“Yes, Dear”) as Andy’s wife, Ruth Barker. Jason Ensler will direct.

Groff said O’Brien had been kicking around the idea for years, and that the two of them spent much of last summer and early fall writing the script. The show was originally set in suburban Connecticut but moved to Los Angeles to tap into the city’s noir roots. In finding someone to play the show’s bright-eyed innocent, O’Brien and Groff quickly homed in on Richter.

“The character has a solid, almost-Bob Newhart-style decency,” Groff said. “It’s someone who’s comfortable in his own skin. It’s the first time I’ve written a script with the lead actor already in mind. It’s nice writing with the voice of a guy whose voice I already get.”

Richter lent a voice to Groff’s short-lived animated skein “Father of the Pride,” and most recently played a version of himself on “Arrested Development.” He next will be seen on an episode of “The New Adventures of Old Christine.”

Richter also starred on Fox’s “Quintuplets,” as well as that net’s short-lived but much-hailed laffer “Andy Richter Controls the Universe.” Richter’s film credits include “Seeing Other People,” “Elf” and “Pootie Tang.”

Beyond “Late Night” and “Father of the Pride,” Groff’s credits include “Ed.” He’ll exec produce through his Red Pulley Prods. label, along with Conaco’s O’Brien, Jeff Ross and David Kissinger.

As for “Southern Comfort,” Roberts will play the show’s patriarch, a man who — unknown to his family — ran a crime syndicate. When he’s forced to step out of the way, his wife (Madeleine Stowe) takes over.

Fimmel will play a young man who both works for the father and serves as a potential love interest to Roberts’ character’s daughter, played by Jessica Stroh.

Twentieth Century Fox TV is behind the pilot. Fimmel’s other credits include the WB’s “Rocky Point,” while Roberts’ recent features include “Spun” and “National Security.”

In other pilot news:

  • Michael Michele (“ER”) has been cast as Bridget, opposite Blair Underwood, in the CBS politically themed pilot “Company Town.”

    Michele’s other credits include “Kevin Hill” and the feature “How to Lose a Guy in 10 Days.”

    • Suzy Nakamura (“The King of Queens”) has been added to ABC’s “Help Me Help You,” the comedy pilot starring Ted Danson.

      Nakamura’s film credits include “Dodgeball” and “8MM.”

      • Gary Halvorson (“Two and a Half Men”) is set to direct NBC’s untitled comedy pilot from Kevin Brennan.