DO NO HARM (NBC/Eric Liebowitz/NBC)

Saturday, Fox News Channel launches the health-and-wellness series “A Healthy You & Carol Alt” (at 4 p.m.), hosted by supermodel Carol Alt.

Discovery Fit & Health’s Saturday night primetime lineup is all about people’s sex lives, culminating with the new docu-series “Secret Sex Lives: Swingers” (at 10), which follows five Atlanta couples who lead double lives.

On the series finale of “Do No Harm” (NBC at 10), Jason finally decides to take care of his split personality once and for all by undergoing a risky surgery.

“Six Little McGhees” (OWN at 10) comes back with new episodes, as Mia and Rozonno McGhee juggle a family business and caring for their 2-year-old sextuplets in Columbus, Ohio.

Sunday talk shows: “Platts Energy Week” (WUSA at 7:30 a.m.) interviews National Mining Association’s Hal Quinn, Entergy Wholesale Commodities’ Bill Mohl and GE’s Johanna Wellington; “This Week in Defense News” (WUSA at 8) has Military Times’ Rick Maze, Lexington Institute’s Loren Thompson and Center for Strategic and International Studies’ Maren Leed; “BioCentury This Week” (WUSA at 8:30) features Friends of Cancer Research’s Jeff Allen, Roche Diagnostics’ Kathleen Claessens and Janssen Diagnostics’ Robert McCormack; “Fox News Sunday” (Fox at 9) hosts White House Chief of Staff Denis McDonough and Sen. Rand Paul (R-Ky.).

“White House Chronicle” (WETA at 9) has journalist Robert Whitcomb, entrepreneur Jeff Giesea and Urbanophile’s Aaron Renn;“Newsmakers”
(C-SPAN at 10) talks to Rep. Xavier Becerra (D-Calif.); “This Is America & the World” (WETA at 10 and WHUT at 6 p.m.) talks to Brookings Institution’s Robert Kagan; “Meet the Press” (NBC at 10:30) has White House Chief of Staff Denis McDonough and Sen. Tom Udall (D-N.M.); “Face the Nation” (CBS at 10:30) talks to Reps. Mike Rogers (R-Mich), Justin Amash (R-Mich.) and Elijah E. Cummings (D-Md.); “Bloomberg Government’s Capitol Gains” (WUSA at 11:30) has Rep. Gerald E. Connolly (D-Va.) and Bloomberg’s Loren Duggan and Heidi Przybyla.

Sunday, media reporter Howard Kurtz makes his debut on Fox News Channel with “MediaBuzz” (at 11 a.m.).

The one-hour special “9-11: The Heartland Tapes” (Smithsonian Channel at 8) looks at scenes from across the nation on Sept. 11, 2001, to look at how the tragedy affected people.

Four kids on “Rachael vs. Guy: Kids Cook-Off” (Food Network at 8) get Rachael Ray and Guy Fieri as mentors during food challenges; and first lady Michelle Obama makes a special guest appearance on the series premiere.

Nucky and crew are back for Season 4 of “Boardwalk Empire” (HBO at 9).

Even “Mob Wives” (VH1 at 10) gets a spinoff, as the cameras follow Big Ang to Miami so she can open up a second location of her Staten Island bar, the Drunken Monkey.

— Emily Yahr