Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What was the production code of the episode written by Brendan Cowell?

### Inputs:
table_name: table, columns: ['Series #', 'Title', 'Director', 'Writer', 'Air Date', 'Production Code']

### Response:
SELECT Production Code FROM table WHERE Writer = Brendan Cowell