'THE LAST GREAT DECADE?': Nat Geo looks back at the 1990s and asks whether or not it can be considered the last great cultural decade for America. (Dora Handel/Corbis Outline)

A football player and a homecoming queen fall in love but then the husband is found stabbed to death, and it’s up to “Dateline NBC” (NBC at 8 p.m.) to uncover the mystery behind who did it.

The remaining un-aired episodes of the canceled “Bad Teacher” (CBS at 8) run back-to-back on consecutive Saturday nights starting tonight with two episodes that involve Meredith getting Botox and accelerating her plan to remarry.

Sunday talk shows: “Platts Energy Week” (WUSA at 8 a.m.) interviews the Bureau of Safety and Environment Enforcement’s Brian Salerno; “BioCentury This Week” (WUSA at 8:30) features Joel Kupersmith of the health unit of the Department of Veterans Affairs; “Fox News Sunday” (Fox at 9) hosts Sen. John Barrasso (R-Wy.); “White House Chronicle” (WETA at 9) has E & E Publishing’s Rod Kuckro; “State of the Union” (CNN at 9) features Rep. Henry Cuellar (D-Tex.).

“Government Matters” (WJLA at 9:30) hosts former U.S. chief technology officer Aneesh Chopra; “Newsmakers” (C-SPAN at 10) talks to Canada’s ambassador to the U.S. Gary Doer; “Sunday Morning Futures With Maria Bartiromo” (Fox News Channel at 10) hosts former economic adviser to George W. Bush Ed Lazear; “This Is America & the World” (WETA at 10 and WHUT at 6 p.m.) talks to Nicaraguan ambassador Francisco Campbell; “Face the Nation” (CBS at 10:30) talks to Sen. John McCain (R-Ariz.).

SERIES PREMIERE: Sunday night, the Rob Lowe-narrated, three-night series “The ’90s: The Last Great Decade?” (National Geographic at 9 p.m.) focuses on the events, people and cultural trends that shaped the 1990s. The high-tech Gulf War and the unlikely rise of Vanilla Ice and Kurt Cobain are discussed in the two-hour opener.

RETURNING SHOW: “Witches of East End” (Lifetime at 9) returns for Season 2 with the Beauchamp witches having a major lapse in memory.

“Miley Cyrus: Bangerz Tour” (NBC at 9) comes to prime-time television in a likely extremely censored broadcast of the star’s latest tour that’s made headlines with its risque props and commentary from the 21-year-old pop phenom.

More provocative TV can be found over on HBO (as per usual) with the latest “True Blood” (9) that’s got Sookie concocting a dangerous plan.

Then, for your daily dose of sad, “The Leftovers” (HBO at 10) has Kevin going to a therapist and Meg trying to let go of her past.

Rachel Lubitz