CREATE TABLE table_26547 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

Who wrote the episode that originally aired on January 15, 1993?
SELECT "Written by" FROM table_26547 WHERE "Original air date" = 'January 15, 1993'
SELECT "Written by" FROM "table_26547" WHERE "Original air date" = 'January 15, 1993'