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

### Instruction:
Who was the director of the movie having a release date of 1934-09-15, an MM Series and a production number less than 6494?

### Inputs:
table_name: table, columns: ['Title', 'Series', 'Director', 'Production Num.', 'Release date']

### Response:
SELECT Director FROM table WHERE Series = mm AND Production Num. < 6494 AND Release date = 1934-09-15