MLK_march_on_washington_1963_lpl_130801_16x9_608It’s the eve of the 50th anniversary of the March on Washington and the “I Have a Dream” speech of Martin Luther King, though you might think the anniversary is over.

True, tens of thousands marched again on Saturday, and a number of news specials have already aired. The best of them, though, premieres tonight, though (PBS, 9 p.m., check local listings) has so many of the same stories as some of the other specials — with recollections that are word for word — it might seem like you’re seeing a rerun if you saw the others.

This is the one film that seems best put together, and without commercials it’s the one that should stand as the standard for the huge event in civil rights, from its planning to its effect and a few details you might not have heard yet.

How do you approach someone who’s a twin? Get some hints on a new “Nick news with Linda Ellerbee” (Nickelodon, 8 p.m.) titled “Twinsanity!”

Cindy Crawford investigates her good-looking genealogy on “Who Do You Think You Are?” (TLC, 9 p.m.).

After weeks of cutting, the semifinalists finally take the stage together on “America’s Talent” (NBC, 9 p.m.) only to realize that, well, maybe they don’t.

“Storage Wars: Texas” (A&E, 9 p.m.) returns for a third season, anxious to open some lockers in Texarkana to start with.

A cliffhanger is expected in the first midseason finale of “Twisted” (ABC Family, 9 p.m.). Ditto for the fourth midseason finale for “Pretty Little Liars” (ABC Family, 8 p.m.), which ends with a roadtrip to Ravenswood, site of a new spinoff this fall.

“Perception” (TNT, 10 p.m.) also winds up its season with a case that’s close to home.

Female athletes are often asked to play up their sex appeal when doing commercial endorsements and the final film in ESPN’s “Nine for IX” documentaries looks into that tendency in a film titled “Branded” (ESPN, 8 p.m.).

Neighbors comete to put on the best dinner party on the special “Keep the Party Moving” (Style, 10 p.m.), which might become a series depending on how it is received.

Washington quarterback Robert Griffin III is the subject of the preseason profile “RGIII: The Will to Win” (ESPN, 7 p.m.).

The career of character actor Martin Balsam is celebrated in a dozen films today on Turner Classic Movies with “Time Limit” (6 a.m.), “Al Capone” (8 a.m.), “Middle of the Night” (10 a.m.), “Ada” (noon), “The Good Guys and the Bad Guys” (2 p.m.), “After the Fox” (4 p.m.), “Seven Days in May” (6 p.m.), “The Anderson Tapes” (8 p.m.), “The Taking of Pelham One two Three” (10 p.m.), “Summer Wishes, Winter Dreams” (midnight), “Little Big Man” (1:45 a.m.) and “The Stone Killer” (4:15 a.m.).

Daytime Talk

Kellly & Michael: Salma Hayek Pinault, Jane Lynch (rerun). The View: Jesse Tyler Ferguson (rerun). The Talk: Blake Shelton (rerun). Ellen DeGeneres: Ted Danson, Fabio Viviani, Bruno Mars (rerun). Wendy Williams: NeNe Leakes, Miguel (rerun).

Late Talk

David Letterman: Anderson Cooper, Olivia Munn, Robert Randolph and the Family band. Jay Leno: Josh Duhamel, J.B. Smoove, Mackelmore & Ryan Lewis. Jimmy Kimmel: Sharon Stone, Dane Cook, Jamie N Commons (rerun). Jimmy Fallon: Dan Aykroyd, Paula Patton, Brad Paisley, Booker T. Jones (rerun). Craig Ferguson: Emily Mortimer, Barry Rothbart (rerun). Carson Daly: Buzz Aldrin, Big Black Delta (rerun). Tavis Smiley: Dr. Algernon Austin, Marian Wright Edelman, Dr. Mary Frances Berry. Conan O’Brien: Vin Diesel, Steve Schirripa, the Mowgli’s (rerun). Chelsea Handler: Jeff Daniels, Greg Fitzsimmons, Natasha Leggero, Brody Stevens.