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_48773 ( "Block" real, "Episode Title" text, "Director" text, "Writer" text, "Producer" text, "Code" text )

### Question ###
Who was the writer that the director was Alice Troughton and the producer was Phil Collinson?

### Accurate SQL ###

SELECT "Writer" FROM table_48773 WHERE "Producer" = 'phil collinson' AND "Director" = 'alice troughton'