Armand Assante and Donald Sutherland star in "The Hunley," a TNT movie centered on the Confederacy's attempt to deploy a submersible vessel late in the Civil War. The film airs Sunday at 8 p.m.

Assante plays the lieutenant who guided the Hunley, the world's first submarine, to sink a Union ship, only to lose his own vessel in the aftermath.

Sutherland plays Confederate Gen. P.G.T. Beauregard, who had twice seen the Hunley lose its crews before sinking a Union ship involved in the blockade of Charleston, S.C., in February 1864.

John Gray directs the film that highlights the history of the vessel and the efforts of its crew, eight of whom propelled the vessel to its top speed of four knots (about 5 mph).

The two-hour film repeats at 10 p.m. and midnight, Wednesday at 8 p.m., Saturday at 6 p.m. and July 18, 21 and 24.

Sunday on Animal Planet at 8 p.m., "The Greenwich Dog Show," a 90-minute special from Purchase, N.Y., hosted by Andrea Joyce and Wayne Cavanaugh. The show is preceded by four 30-minute episodes of "Breed All About It," an opportunity to learn more about beagles, Dalmatians, collies and shepherds, starting at 6 p.m.

Monday on Discovery Channel at 10 p.m., Headline Discovery's "Merchants of Death" focuses on two of the biggest arms dealers in the world, Lebanese-born Sarkis Soghnalian and Sam Cummings, a Philadelphia-born Army veteran. Repeats at 1 a.m.

Monday on Sci-Fi Channel at 10 p.m., "Curse of the Blair Witch," set in Burkittsville, Md., where in 1785 Elly Kedward was convicted as a witch, tied to a tree and left for dead. About a year later, all of her accusers and about half of the town's children mysteriously vanished. In 1994, three students ventured to the area to turn the Blair Witch saga into a film project. Their bodies were never found. Is it all a myth? A conspiracy? The work of an evil spirit? This show airs in conjunction with the theatrical release of the students' film. It repeats at 1 a.m.

Wednesday on USA Network at 9 p.m., "Dead Man's Curve," in which Matthew Lillard and Michael Vartan plan to knock off roommate Randall Batinkoff, frame it as a suicide and post straight A's for the semester. Keri Russell co-stars in the plot, in which bonds of loyalty and friendship dissolve into lies and deception. Repeats Saturday at 7 p.m.

Thursday on American Movie Classics at 10 p.m., "Hollywood's Legendary Homes" tours mansions of stars including Jayne Mansfield, Bing Crosby, Orson Welles and Rita Hayworth. Sally Kellerman's narration includes stories about the homes and what reportedly took place behind the gates. Repeats at 3:30 a.m.

Saturday on A&E Network at 9 p.m., "Live By Request Starring Earth Wind & Fire." The multi-Grammy Award-winning superstars, who have sold more than 20 million albums, will take song requests via an on-screen 800 telephone number throughout the live two-hour broadcast. Mark McEwen will host. Repeats: 1 a.m. and July 25 at 10 p.m.

CAPTION: Donald Sutherland stars in "The Hunley," debuting Sunday at 8 p.m. on TNT.