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

### Instruction:
What is the episode number with a title "baby's a rock 'n' roller"?

### Inputs:
table_name: table, columns: ['Series episode', 'Season episode', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (in million)']

### Response:
SELECT MIN Series episode FROM table WHERE Title = "Baby's a Rock 'N' Roller"