Motor-mouthed comic and actor John Leguizamo makes his debut as a director with the cable boxing drama “Undefeated” (7 p.m. today, HBO). Best-known for his painfully funny autobiographical monologues, Leguizamo makes a safe choice here, with a modern but hardly innovative variation on the oft-told tale of a boxer from an ethnic neighborhood who loses his roots as he is seduced by Manhattan’s glitter.

Give Leguizamo credit for spending time at a boxing gym to whip himself into shape to portray up-and-coming pugilist Lex Vargas. But all the muscles in the world can’t make a champion out of this tired palooka of a movie.

• ‘Tis the season of Seabiscuit. The Depression-era horse has spawned a best-selling book, an “American Experience” documentary, a motion picture starring Tobey Maguire, and now “Seabiscuit — Behind the Blockbuster” (8 p.m. Sunday, A&E), a “Biography”-style profile. The champion’s hold on late-1930s America cannot be overstated. In 1938, Seabiscuit received more column inches of newspaper coverage than any living person. President Roosevelt came in second, and Adolf Hitler third.
• A kitchen fire smokes out some customers on the second episode of “Restaurant” (9 p.m. Sunday, NBC). Actually, they’re not really customers, but friends, family and some critics enjoying a free meal. But that doesn’t stop some of them from jaw-dropping acts of rude behavior and condescension towards Rocco’s staff. This series captures New Yorkers at their least attractive.

Tonight’s other highlights

• Scheduled on a repeat “48 Hours Investigates” (7 p.m., CBS): after 40 years, two women discover that they were switched at birth.
• On back-to-back original “Just Shoot Me” (NBC): a hair crisis (7 p.m.), Elliot’s brother (David Cross) pulls a new con (7:30 p.m.).
• Bill Paxton and Charlize Theron star in the 1999 thriller “Mighty Joe Young” (7 p.m., ABC).
• The voices of Woody Allen and Sylvester Stallone collaborate in the 1998 animated comedy “Antz” (8 p.m., NBC).

Sunday’s other highlights

• Scheduled on a repeat “60 Minutes” (6 p.m., CBS): a hospital accused of profiting from hundreds of unnecessary and expensive operations; director Michael Moore.
• A stranger shakes up a small town in Kansas University grad William Inge’s drama “Picnic” (8 p.m., CBS), starring Josh Brolin and Gretchen Mol.
• Christopher Reeve guest stars on “The Practice” (9 p.m., ABC).