<Table> The Doctor <Tr> <Th_colspan="2"> The Twelfth Doctor </Th> </Tr> <Tr> <Td_colspan="2"> Doctor Who character </Td> </Tr> <Tr> <Td_colspan="2"> Peter Capaldi as the Twelfth Doctor </Td> </Tr> <Tr> <Th> First regular appearance </Th> <Td> "The Time of the Doctor" </Td> </Tr> <Tr> <Th> Last regular appearance </Th> <Td> "Twice Upon a Time" </Td> </Tr> <Tr> <Th> Portrayed by </Th> <Td> Peter Capaldi </Td> </Tr> <Tr> <Th> Preceded by </Th> <Td> Matt Smith </Td> </Tr> <Tr> <Th> Succeeded by </Th> <Td> Jodie Whittaker </Td> </Tr> <Tr> <Th_colspan="2"> Information </Th> </Tr> <Tr> <Th> Tenure </Th> <Td> 25 December 2013--25 December 2017 </Td> </Tr> <Tr> <Th> No of series </Th> <Td> </Td> </Tr> <Tr> <Th> Appearances </Th> <Td> 35 stories (40 episodes) </Td> </Tr> <Tr> <Th> Companions </Th> <Td> <Ul> <Li> Clara Oswald </Li> <Li> River Song </Li> <Li> Nardole </Li> <Li> Bill Potts </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Series </Th> <Td> <Ul> <Li> Series 8 (2014) </Li> <Li> Series 9 (2015) </Li> <Li> Series 10 (2017) </Li> </Ul> </Td> </Tr> <Tr> <Th> Previous version </Th> <Td> Eleventh Doctor </Td> </Tr> <Tr> <Th> Next version </Th> <Td> Thirteenth Doctor </Td> </Tr> </Table> <Tr> <Th_colspan="2"> The Twelfth Doctor </Th> </Tr>

When does peter capaldi start as dr who