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What to Watch on Tuesday: Big network premieres, Joan Rivers documentary

Joan Rivers in “Joan Rivers: A Piece Of Work,” directed by Ricki Stern and Annie Sundberg.
Joan Rivers in “Joan Rivers: A Piece Of Work,” directed by Ricki Stern and Annie Sundberg. Charles Miller

Joan Rivers: A Piece of Work (10:30pm, UNC-TV) - PBS has exclusive broadcast rights to this fascinating and critically acclaimed 2010 documentary about comedian Joan Rivers, who died earlier this month. Filmmakers Ricki Stern and Annie Sundberg spent a year filming Rivers (76 at the time) and exposed the private dramas of the irreverent, legendary comedian as she fought to keep her career thriving in a business driven by youth and beauty. After tonight’s broadcast, the film will be available on the American Masters website ( pbs.org/americanmasters) for a limited time.

Also on tonight . . .

NCIS (8pm, CBS) - Season 12 of this CBS powerhouse begins with Gibbs and McGee traveling to Russia to escort home an NCIS computer engineer who is connected to classified intel. But the mission is compromised and the trio go off the grid while being hunted by a Russian mercenary group (darn you, Putin!).

Finding Your Roots (8pm, UNC-TV) - The second season of this Henry Louis Gates series opens with Stephen King, Courtney B. Vance and Gloria Reuben learning about their paternal ancestry.

NCIS: New Orleans (9pm, CBS) - This “NCIS” spinoff doesn’t stray from the franchise’s tried-and-true formula, but this time with Scott Bakula, Lucas Black and CCH Pounder working in the New Orleans field office. In the pilot, the NOLA gang investigates a murder with ties to the military, and the case gets personal for Pride (Bakula) when the victim is identified as a man he once mentored. More about “NCIS: New Orleans.”

Marvel’s Agents of S.H.I.E.L.D. (9pm, ABC) - In the Season 2 opener, Coulson settles into his new role as head of SHIELD as his team expands to take on new threats.

American Masters: The Boomer List (9pm, UNC-TV) - It’s the story of the baby boom generation, which consists of people born from 1946 to 1964, told through the lives of 19 iconic boomers (one from each year). Included: Samuel L. Jackson, Billy Joel, Deepak Chopra, Maria Shriver and David LaChapelle.

Chicago Fire (10pm, NBC) - In the Season 3 opener, we learn who survived the explosion at the end of last season’s finale. As Boden and the rest of Firehouse 51 deal with the explosion’s aftermath, Casey searches for Severide, who has gone missing.

Forever (10pm, ABC) - “Forever” settles into its normal time-slot with an episode in which Henry and Jo go on a rogue investigation to disprove a police theory.

Person of Interest (10pm, CBS) - Season 4 opens with Finch, Reese, Shaw and Root adapting to the new identities created to protect them from Samaritan. Meanwhile, the Machine continues to send out numbers, potentially putting the entire group in danger of detection.