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

### Instruction:
List the number of viewers when the cable rank for Russell Howard's Good New was 5.

### Inputs:
table_name: table, columns: ['Episode no.', 'Airdate', 'Viewers', 'BBC Three weekly ranking', 'Cable rank']

### Response:
SELECT Viewers FROM table WHERE Cable rank = 5