<Tr> <Th> Directed by </Th> <Td> Brian Welsh </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Jesse Armstrong </Td> </Tr> <Tr> <Th> Featured music </Th> <Td> Original Score by Stuart Earl </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> 18 December 2011 (2011 - 12 - 18) </Td> </Tr>

What is season 1 episode 3 of black mirror about