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

### Instruction:
What is the show episode number of the episode that reached 1.215 millions views?

### Inputs:
table_name: table, columns: ['Series episode', 'Season episode', 'Title', 'Directed by', 'Written by', 'Original air date', 'Viewers (millions)']

### Response:
SELECT MIN Series episode FROM table WHERE Viewers (millions) = 1.215