<Tr> <Th> Series </Th> <Td> Series 4 </Td> </Tr> <Tr> <Th> Length </Th> <Td> 1st of 2 - part story, 45 minutes </Td> </Tr> <Tr> <Th> Originally broadcast </Th> <Td> 31 May 2008 </Td> </Tr> <Tr> <Th_colspan="2"> Chronology </Th> </Tr>

Doctor who hey who turned out the lights episode