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

### Instruction:
What was the number of season number entries that had US Viewers of 12.30 million?

### Inputs:
table_name: table, columns: ['Season no.', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. Viewers (millions)']

### Response:
SELECT COUNT Season no. FROM table WHERE U.S. Viewers (millions) = 12.30