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_27487310_5 (name VARCHAR, host_s_ VARCHAR)

### Question ###
What is the name of the series with the unknown host?

### Accurate SQL ###

SELECT name FROM table_27487310_5 WHERE host_s_ = "unknown"