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

### Instruction:
When did the season premiere that saw 8.4 million viewers first air?

### Inputs:
table_name: table, columns: ['Season', 'Season premiere', 'Season finale', 'TV season', 'Ranking', 'Viewers (in millions)']

### Response:
SELECT Season premiere FROM table WHERE Viewers (in millions) = 8.4