<Tr> <Td> 1 . </Td> <Td> "Sleeping Beauty" </Td> <Td> 2: 29 </Td> </Tr> <Tr> <Td> 2 . </Td> <Td> "True Love" </Td> <Td> 4: 45 </Td> </Tr> <Tr> <Td> 3 . </Td> <Td> "Magic" </Td> <Td> 3: 12 </Td> </Tr> <Tr> <Td> 4 . </Td> <Td> "We Are Both" </Td> <Td> 1: 41 </Td> </Tr>

How many series of once upon a time are there