TONIGHT'S MUST-SEE

"American Masters: Woody Guthrie" 9 p.m.; and "Great Performances: We Shall Overcome: The Seeger Sessions," midnight; PBS. Two of TV's greatest shows link for a wondrous night, starting with a beautifully detailed "American Masters," rich in old films and new analysis on Woody Guthrie, who grew up in a hardscrabble Oklahoma town and wandered the country during the Depression. Many of his songs — "Do Re Mi," "Deportees," "Union Maid" — raged at treatment of the workingman.

A superb Bruce Springsteen concert of Pete Seeger's songs follows at midnight. For this hour, Springsteen does only one of Seeger's protest songs, the passionate "We Shall Overcome." He sticks to such standards as "John Henry." It all works wonderfully; backed by amazing musicians, Springsteen creates a concert for the ages.

OF NOTE

"Jean-Michel Cousteau: Ocean Adventures: 'Sharks: at Risk,"' 8 p.m., PBS. The battle is a mismatch, Cousteau argues: Each year, sharks attack humans fewer than 100 times; each year, humans kill millions of sharks. For this special, he brings his cameras virtually nose-to-nose with the sharks.

"The George Lopez Show," 7 p.m., ABC. Everyone has trouble now. His wife frets over pregnancy test, their daughter frets over college acceptance ... and his mom is hiding from the police.

"Lost," 8 and 9 p.m., ABC. The first rerun pauses to review some characters. The second brings trouble for Charlie: Mr. Eko questions him; Claire loses faith in him.

"Project Runaway," 7 and 8 p.m., Bravo. One of the best reality competitions is back for its third round. First comes a special, looking at the casting process; then the show begins.

"Nightmares & Dreamscapes" debut, 6 and 6:50 p.m., TNT. While the broadcast networks do low-cost summer shows, TNT tackles something big and ambitious. Each of these eight hours is from a Stephen King story; each gets movie-level actors and production values. In the first hour, William Hurt plays a hit man, facing vengeance from toy soldiers — all without a word of dialogue. The second hour, "Crouch End," is beautifully filmed and acted but has a so-so story. Claire Forlani and Eion Bailey play newlyweds, wandering into a spooky London neighborhood.