THE DEAN of do-wop, Dick Lillard, will observe the 10th anniversary of Elvis Presley's death with a five-hour special at 8 p.m. Friday on WXTR-FM (104.1). Lillard will trace the King's career beginning with Sun Records in the mid-'50s until his death in 1977.

WMAL-AM (630) also gets into the Elvis act Sunday (the actual anniversary of Presley's death) at 5:05 p.m. when Rick Fowler features five-hours of rare recordings and memorable moments.

National Public Radio's Sunday "Weekend Edition with Susan Stamberg" winds up its often hilarious chain novel with Chapter 25: "Epiphany a la Mode." The final chapter, written by Chicago transportation geographer Chris Saricks, was chosen from more than 400 nationwide entries, an impressive turnout that surprised the folks at NPR. Also this week, Stamberg interviews actress Carrie Fisher about her new book "Postcards From the Edge." The two-hour Sunday show, heard here on WAMU-FM (88.5) at 10 a.m., debuted in January and has developed into a delightful information service with such features as Tom and Ray Magliozzi, a pair of wacky brothers who operate "The Good News Garage" in Cambridge, Massachusetts, in which they try to solve listeners' car problems with a double-dose of banter.

Here's what else is in the air: