<P> The following is a list of episodes for the CBC / Showtime television series The Tudors . The series formally began April 1, 2007 . Individual episodes are numbered . </P> <P> On June 20, 2010, the series aired its 38th and final episode . All four seasons have been released on DVD in Regions 1, 2 and 4 . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th> Originally aired </Th> <Th_colspan="4"> DVD release date </Th> </Tr> <Tr> <Th> Region 1 </Th> <Th> Region 2 </Th> <Th> Region 4 </Th> <Th> Discs </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 10 </Td> <Td> 2007 </Td> <Td> January 8, 2008 </Td> <Td> December 10, 2007 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 10 </Td> <Td> 2008 </Td> <Td> November 11, 2008 (Canada) January 6, 2009 (United States) </Td> <Td> October 13, 2008 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 8 </Td> <Td> 2009 </Td> <Td> November 10, 2009 (Canada) December 15, 2009 (United States) </Td> <Td> December 7, 2009 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 10 </Td> <Td> </Td> <Td> October 12, 2010 (United States) November 9, 2010 (Canada) </Td> <Td> March 21, 2011 </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th> Originally aired </Th> <Th_colspan="4"> DVD release date </Th> </Tr>

How many episodes in series 4 of the tudors