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

### Instruction:
How many episodes had celebrity guest stars Frank Skinner and Lee Mack?

### Inputs:
table_name: table, columns: ['Episode', 'Stage', 'Celebrities', 'Directed and produced by', 'Original airdate', 'Viewers (overnight estimates)']

### Response:
SELECT COUNT Episode FROM table WHERE Celebrities = Frank Skinner and Lee Mack