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

### Instruction:
What is the historical reference of the episode that aired on October 23, 2005?

### Inputs:
table_name: table, columns: ['Episode Number', 'Title', 'Podcast Date', 'Run time', 'Historical References']

### Response:
SELECT Historical References FROM table WHERE Podcast Date = october 23, 2005