CREATE TABLE table_20081 ("No. in season" FLOAT, "No. disc" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

Which number episode of season 6 was the title 'Sight Unseen'?
SELECT MIN("No. in season") FROM table_20081 WHERE "Title" = 'Sight Unseen'
SELECT MIN("No. in season") FROM "table_20081" WHERE "Title" = 'Sight Unseen'