Remote patrol

Tonight's "Mystery!" (8, Channel 19) retreads the familiar whodunit formula in which a big-city crime interrupts the pleasures of small-town life, and a sleuth finds herself at odds with the official crime-solvers. The twist to tonight's tale, "Trial by Fire," is that the sleuth is the town prosecutor, and the fellow she's sleeping with happens to be the police chief. Juliet Stevenson ("Truly, Madly, Deeply") stars. Also tonight, Alf Landon's and Nancy Kassebaum Baker's political careers are told from a Kansas perspective on "Sunflower Journeys," at 7 on Topeka's KTWU (Channel 11). @ART CAPTION:Juliet Stevenson as litigator Helen West @ART:Photo