CREATE TABLE table_name_1 (episode_title VARCHAR, original_airdate VARCHAR)

What is the title of the episode that originally aired on March 31, 2008?
SELECT episode_title FROM table_name_1 WHERE original_airdate = "march 31, 2008"
SELECT "episode_title" FROM "table_name_1" WHERE "march 31, 2008" = "original_airdate"