CREATE TABLE table_73453 ("No." FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "Viewers  ( in millions ) " CLOB)

What is the original air date for production code 1ark79?
SELECT "Original air date" FROM table_73453 WHERE "Production code" = '1ARK79'
SELECT "Original air date" FROM "table_73453" WHERE "Production code" = '1ARK79'