<Table> <Tr> <Th_colspan="2"> The Vampire Diaries (season 4) </Th> </Tr> <Tr> <Td_colspan="2"> Season 4 DVD Cover </Td> </Tr> <Tr> <Th> Starring </Th> <Td> <Ul> <Li> Nina Dobrev </Li> <Li> Paul Wesley </Li> <Li> Ian Somerhalder </Li> <Li> Steven R. McQueen </Li> <Li> Kat Graham </Li> <Li> Zach Roerig </Li> <Li> Candice Accola </Li> <Li> Michael Trevino </Li> <Li> Joseph Morgan </Li> </Ul> </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 23 </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> The CW </Td> </Tr> <Tr> <Th> Original release </Th> <Td> October 11, 2012 (2012 - 10 - 11)--May 16, 2013 (2013 - 05 - 16) </Td> </Tr> <Tr> <Th_colspan="2"> Season chronology </Th> </Tr> <Tr> <Td_colspan="2"> ← Previous Season 3 Next → Season 5 </Td> </Tr> <Tr> <Td_colspan="2"> List of The Vampire Diaries episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> The Vampire Diaries (season 4) </Th> </Tr>

When was season 4 of the vampire diaries filmed