CREATE TABLE table_23853 ("No. in series" FLOAT, "Title" CLOB, "Directedby" CLOB, "Writtenby" CLOB, "Originalairdate" CLOB, "Production code" CLOB)

What was the production code for episode #1?
SELECT "Production code" FROM table_23853 WHERE "No. in series" = '1'
SELECT "Production code" FROM "table_23853" WHERE "No. in series" = '1'