Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_4177 ( "Episode" text, "First broadcast" text, "Andrew and Georgies guest" text, "Jamie and Johns guest" text, "Scores" text )

### Question ###
When was episode 02x07 first broadcast?

### Accurate SQL ###

SELECT "First broadcast" FROM table_4177 WHERE "Episode" = '02x07'