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

### Instruction:
What series number is the episode "peace, brother"?

### Inputs:
table_name: table, columns: ['Episode No. Episode No. refers to the episodes number in the overall series, whereas Series No. refers to the episodes number in this particular series.', 'Series No.', 'Episode', 'Director', 'Writer(s)', 'Original airdate']

### Response:
SELECT Series No. FROM table WHERE Episode = "Peace, Brother"