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_63544 ( "Children of Earth" text, "Run time" text, "Writer" text, "Director" text, "Original airdate" text, "Viewers (including HD) in millions" text )

### Question ###
How many viewers were there for Children of Earth of 'day one'?

### Accurate SQL ###

SELECT "Viewers (including HD) in millions" FROM table_63544 WHERE "Children of Earth" = 'day one'