CREATE TABLE table_68691 ("Episode #" FLOAT, "Title" CLOB, "Part 1" CLOB, "Part 2" CLOB, "Part 3" CLOB, "Part 4" CLOB, "Part 5" CLOB, "Part 6" CLOB)

When is Part 6, when Part 4 is on March 2, 2008?
SELECT "Part 6" FROM table_68691 WHERE "Part 4" = 'march 2, 2008'
SELECT "Part 6" FROM "table_68691" WHERE "Part 4" = 'march 2, 2008'