From rock-and-rollers to longtime pop crooners, music infiltrates the lineup in several programs, and Barbara Walters has a conversation with Brian "Kato" Kaelin.
* "One Life to Live" (2 p.m.-3 p.m., WMAR, Channel 2) -- Daytime alert! Durable rock star Little Richard plays himself and sings "Send Me Some Loving," "Tutti Frutti" and "Good Golly, Miss Molly" at the wedding of Bo and Nora (Robert S. Woods and Hillary B. Smith). ABC.
* "Boy Meets World" (8:30 p.m.-9 p.m., WMAR, Channel 2) -- In a repeat from November, three real rock-and-rollers appear in an episode in which totally non-musical Cory and Shawn (Ben Savage and Rider Strong) fake it as members of a rock band to attract girls. The guests are Billy Vera (Billy Vera and The Beaters), Micky Dolenz (The Monkees) and Rick Nielson (Cheap Trick). ABC.
* "Evening at Pops" & "Frank Sinatra: Concert for the Americas" ** (9 p.m.-10 p.m. & 10 p.m.-11 p.m., MPT, Channels 22, 67) -- Two singers who define their generation of pop music are featured in back-to-back hours. In the first, Tony Bennett appears with composer Michel Legrand and the Boston Pops Orchestra. In the second, filmed in 1982 in the Dominican Republic, Old Blue Eyes is backed by the Buddy Rich Orchestra in a collection of classics.
* "20/20" (10 p.m.-11 p.m., WMAR, Channel 2) -- In his first national interview since release of "Kato Kaelin: The Whole Truth," a book that raises questions about his testimony at the O. J. Simpson trial, the witness sits down to answer them with Barbara Walters. ABC.
* "Dinosaurs and Beyond" (8 p.m.-11 p.m., The Learning Channel) -- Beginning with the hour-long "Searching for Dinosaurs," five installments track modern paleontology studies through flying dinosaurs, the origin of marine mammals and on to the arrival of human-like creatures on Earth some 2 million years ago.
* "Investigative Reports: Who Is Timothy McVeigh?" (9 p.m.-10 p.m., A&E; Network) -- Host Bill Kurtis profiles the chief suspect in the Oklahoma City bombing, including interviews with friends and acquaintances, tracing his life from childhood in upstate New York through Army duty in Kansas to his involvement in the Michigan Militia.