CREATE TABLE table_2874 ("Episode Number" FLOAT, "Title" TEXT, "Directed By" TEXT, "Written By" TEXT, "Original Air Date" TEXT, "Production Code" FLOAT)

On what date did episode 2 air?
SELECT "Original Air Date" FROM table_2874 WHERE "Episode Number" = '2'
SELECT "Original Air Date" FROM "table_2874" WHERE "Episode Number" = '2'