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

### Instruction:
List the director and producer when Nick Hewer and Saira Khan were starring.

### Inputs:
table_name: table, columns: ['Episode', 'Stage', 'Celebrities', 'Directed and produced by', 'Original airdate', 'Viewers (overnight estimates)']

### Response:
SELECT Directed and produced by FROM table WHERE Celebrities = Nick Hewer and Saira Khan