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_name_27 ( country VARCHAR, series_premiere VARCHAR, tv_network_s_ VARCHAR )

### Question ###
What country has a series premier of unknown and mbc action as their TV network?

### Accurate SQL ###

SELECT country FROM table_name_27 WHERE series_premiere = "unknown" AND tv_network_s_ = "mbc action"