CREATE TABLE table_642 ("Episode #" FLOAT, "Title" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Part 5" TEXT, "Part 6" TEXT)

What's the name of the episode whose part 3 aired on February 7, 2008?
SELECT "Title" FROM table_642 WHERE "Part 3" = 'February 7, 2008'
SELECT "Title" FROM "table_642" WHERE "Part 3" = 'February 7, 2008'