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

### Instruction:
When "the postcard" is the original title what is the production code?

### Inputs:
table_name: table, columns: ['#', 'Original title', 'Directed by', 'Written by', 'Original airdate', 'Prod. code', 'Viewers']

### Response:
SELECT Prod. code FROM table WHERE Original title = "The Postcard"