CREATE TABLE "table1_17641206_6" (
  "episode" real,
  "original_title" text,
  "directed_by" text,
  "written_by" text,
  "original_airdate" text,
  "duration" text,
  "viewership" text
);

Question: Name the number of duration for viewership of 5.46 million
SQL: SELECT COUNT("duration") FROM "table1_17641206_6" WHERE "viewership"='5.46 million';

Question: Name the total number of episodes written by david cantor
SQL: SELECT COUNT("episode") FROM "table1_17641206_6" WHERE "written_by"='David Cantor';

Question: Name the total number of original titles written by john sullivan and keith lindsay
SQL: SELECT COUNT("original_title") FROM "table1_17641206_6" WHERE "written_by"='John Sullivan and Keith Lindsay';

Question: Name the original title for 6.05 million viewership
SQL: SELECT "original_title" FROM "table1_17641206_6" WHERE "viewership"='6.05 million';