Who was the writer of "Face Off"?
CREATE TABLE "table1_23170118_2" (
  "episode_number" text,
  "title" text,
  "villains" text,
  "director" text,
  "writer" text,
  "original_airdate" text
);
SELECT "writer" FROM "table1_23170118_2" WHERE "title"='\"Face Off\"';