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

### Instruction:
What is the Episode number of Ernest Dickerson in 2009 when the show was dexter?

### Inputs:
table_name: table, columns: ['Year', 'Show', 'Season', 'Episode', 'Notes']

### Response:
SELECT Episode FROM table WHERE Year = 2009 AND Show = dexter