CREATE TABLE table_73894 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

What is the title of the episode with the original air date October 21, 1998?
SELECT "Title" FROM table_73894 WHERE "Original air date" = 'October 21, 1998'
SELECT "Title" FROM "table_73894" WHERE "Original air date" = 'October 21, 1998'