What was the Tuesday episode if theThursday episode was 196 Buried?
CREATE TABLE "table1_18173916_6" (
  "episodes" text,
  "monday" text,
  "tuesday" text,
  "wednesday" text,
  "thursday" text,
  "friday" text
);
SELECT "tuesday" FROM "table1_18173916_6" WHERE "thursday"='196 Buried';