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

### Instruction:
What was the first broadcast date of the episode in which Sean's team is made up of Peter Serafinowicz and Johnny Vegas?

### Inputs:
table_name: table, columns: ['Episode', 'First broadcast', 'Seans team', 'Daves team', 'Scores']

### Response:
SELECT First broadcast FROM table WHERE Seans team = Peter Serafinowicz and Johnny Vegas