SUNDAY Oceanquest (NBC, 8-9 p.m.): Premi`ere of five-part underwater adventure series featuring great white sharks and, oh yes, girls in swimsuits. MONDAY
The Second Honeymoon (Showtime/Cable 11:30 a.m.-12:30 p.m., 8-9 p.m.): Lost episodes of ``The Honeymooners,'' with reminiscences by Jackie Gleason, Art Carney, and Audrey Meadows. It's pay cable, so you may have to make do with reruns on free channels.
Today: At Night (NBC, 8-9 p.m.): Prime-time edition of the morning show, featuring Jane Pauley and Bryant Gumbel staying up late for a change.
Country Celebrates America (PBS, 9:05-10:25 p.m.): Taped Washington, D.C., concert features Roy Clark, Mel Tillis, Janie Fricke, and B. J. Thomas . . . singin' about the good ol' USA. TUESDAY
From Blitzkreig to the Bomb (PBS, 9:10-10:30 p.m.): World War II documentary from France combines combat photography and contemporary newsreels. Once upon a time, there was a Maginot line. . . .
Check local listings for all programs, especially those on PBS, where local option often results in varying days as well as times.