Jules Verne's "Journey to the Center of the Earth" comes to USA Network as a four-hour miniseries airing Tuesday and Wednesday at 8 p.m.

Treat Williams heads the cast as Prof. Theodore Lytton, with Jeremy London as his nephew and Tushka Bergen as Alice, who is in search of her missing husband, played by Bryan Brown. Co-stars include Hugh Keays-Byrne and Petra Yared.

The story, filmed in Australia and New Zealand, is about that search, during which the party discovers a bizarre land with strange customs and a plant that has the potential to be an all-healing medication.

This is USA's second miniseries. The first, "Moby Dick," also aired in two parts and drew the largest and second-largest audience for an original entertainment program on basic cable, USA noted.

Part 1 airs Tuesday at 8 and repeats at 10 p.m.; Part 2 airs Wednesday at the same time. All four hours air Sunday, Sept. 19, at 3 p.m. and Saturday, Sept. 25, at 1 p.m.

* Sunday on CMT at 2 p.m., "Farm Aid '99" airs live for eight hours from Nissan Pavilion in Prince William County, Va. The 12th Farm Aid concert lineup includes hosts Willie Nelson, John Mellencamp and Neil Young, with the Dave Matthews Band, Barenaked Ladies, Deana Carter, Trisha Yearwood and Sawyer Brown. Farm Aid has distributed $14.5 million since it began in 1985.

* Sunday on Romance Classics at 7:30 p.m., Lucille Ball and Desi Arnaz are profiled in "Great Romances of the 20th Century," a series that recounts legendary love affairs of prominent public figures. Repeats at 1 a.m.

* Sunday on Discovery Channel at 8 p.m., "Extreme Alaska," a one-hour show about the biggest, coldest, windiest and wildest state, the spirit of the Alaskan people and what the land means to them.

* Sunday on CNBC at 8 p.m., "National Geographic Explorer" offers four new segments: "Crocodile Wild," which explores the problem of attacks on humans in Costa Rica; "Fantastic Voyage," about Poppa Neutrino and his crew of three (and three dogs) who built a 51-foot raft out of materials gleaned from New York dumpsters to set sail across the Atlantic; "Mummies of Gold," about the excavation of graves at Bahariya Oasis; and "Assignment: Killer Pigs," about Bolivia's wild pigs, which have been known to attack and eat people. Repeats Saturday at 8 p.m.

* Sunday on Sci-Fi Channel at 11 p.m., "Mystery Science Theater 3000" gets one more outing so Mike Nelson and his robot pals can rib a never-aired episode of "Merlin's Shop of Mystical Wonders," starring Ernest Borgnine.

* Monday on Showtime at 10 p.m., "Robert Zemeckis on Smoking, Drinking and Drugging in the 20th Century," a documentary illustrating how pervasive drugs and alcohol are in American culture. Repeats Thursday at midnight.

* Monday-Friday on BBC America at 8 p.m., "Real Soap," a ratings success in Great Britain. The series offers portraits of everyday people. One story, "Paddington Green," looks at life in London through the eyes of models, prostitutes, safe-crackers and con artists. Another, "Driving School," watches a 55-year-old woman take her driving test for the seventh time. Starting Sept. 20, "Real Soap" will air weekdays at 9:20 p.m.

* Saturday on The Nashville Network at 9 p.m., the spirit of gospel music is celebrated by Grammy winner Bill Gaither and his friends in a one-hour special, "Sweet, Sweet Spirit."