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_45280 ( "Series Number" real, "Number of Episodes" real, "Original Air Date" real, "DVD Region 2 release date" text, "DVD Region 1 release date" text )

### Question ###
What was the original air date of series number 10?

### Accurate SQL ###

SELECT AVG("Original Air Date") FROM table_45280 WHERE "Series Number" = '10'