<Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td> Vengeance </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> January 27, 2012 (2012 - 01 - 27) </Td> <Td> March 30, 2012 (2012 - 03 - 30) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td> War of the Damned </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> January 25, 2013 (2013 - 01 - 25) </Td> <Td> April 12, 2013 (2013 - 04 - 12) </Td> </Tr> <Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "The Red Serpent" </Td> <Td> Rick Jacobson </Td> <Td> Steven S. DeKnight </Td> <Td> January 22, 2010 (2010 - 01 - 22) </Td> <Td> SPS101 </Td> <Td> 0.66 </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Sacramentum Gladiatorum" </Td> <Td> Rick Jacobson </Td> <Td> Steven S. DeKnight </Td> <Td> January 29, 2010 (2010 - 01 - 29) </Td> <Td> SPS102 </Td> <Td> 0.77 </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Legends" </Td> <Td> Grady Hall </Td> <Td> Brent Fletcher </Td> <Td> February 5, 2010 (2010 - 02 - 05) </Td> <Td> SPS103 </Td> <Td> 0.86 </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "The Thing in the Pit" </Td> <Td> Jesse Warn </Td> <Td> Aaron Helbing & Todd Helbing </Td> <Td> February 12, 2010 (2010 - 02 - 12) </Td> <Td> SPS104 </Td> <Td> 0.66 </Td> </Tr> <Tr> <Th> 5 </Th> <Td> 5 </Td> <Td> "Shadow Games" </Td> <Td> Michael Hurst </Td> <Td> Miranda Kwok </Td> <Td> February 19, 2010 (2010 - 02 - 19) </Td> <Td> SPS105 </Td> <Td> 0.85 </Td> </Tr> <Tr> <Th> 6 </Th> <Td> 6 </Td> <Td> "Delicate Things" </Td> <Td> Rick Jacobson </Td> <Td> Tracy Bellomo & Andrew Chambliss </Td> <Td> February 26, 2010 (2010 - 02 - 26) </Td> <Td> SPS106 </Td> <Td> 1.08 </Td> </Tr> <Tr> <Th> 7 </Th> <Td> 7 </Td> <Td> "Great and Unfortunate Things" </Td> <Td> Jesse Warn </Td> <Td> Brent Fletcher & Steven S. DeKnight </Td> <Td> March 12, 2010 (2010 - 03 - 12) </Td> <Td> SPS107 </Td> <Td> 0.97 </Td> </Tr> <Tr> <Th> 8 </Th> <Td> 8 </Td> <Td> "Mark of the Brotherhood" </Td> <Td> Rowan Woods </Td> <Td> Aaron Helbing & Todd Helbing </Td> <Td> March 19, 2010 (2010 - 03 - 19) </Td> <Td> SPS108 </Td> <Td> 0.88 </Td> </Tr> <Tr> <Th> 9 </Th> <Td> 9 </Td> <Td> "Whore" </Td> <Td> Michael Hurst </Td> <Td> Daniel Knauf </Td> <Td> March 26, 2010 (2010 - 03 - 26) </Td> <Td> SPS109 </Td> <Td> 1.11 </Td> </Tr> <Tr> <Th> 10 </Th> <Td> 10 </Td> <Td> "Party Favors" </Td> <Td> Chris Martin - Jones </Td> <Td> Brent Fletcher & Miranda Kwok </Td> <Td> April 2, 2010 (2010 - 04 - 02) </Td> <Td> SPS110 </Td> <Td> 1.27 </Td> </Tr> <Tr> <Th> 11 </Th> <Td> 11 </Td> <Td> "Old Wounds" </Td> <Td> Glenn Standring </Td> <Td> Story by: Dan Filie & Patricia Wells </Td> <Td> April 9, 2010 (2010 - 04 - 09) </Td> <Td> SPS111 </Td> <Td> 1.13 </Td> </Tr> <Tr> <Th> 12 </Th> <Td> 12 </Td> <Td> "Revelations" </Td> <Td> Michael Hurst </Td> <Td> Brent Fletcher </Td> <Td> April 16, 2010 (2010 - 04 - 16) </Td> <Td> SPS112 </Td> <Td> 1.29 </Td> </Tr> <Tr> <Th> 13 </Th> <Td> 13 </Td> <Td> "Kill Them All" </Td> <Td> Jesse Warn </Td> <Td> Steven S. DeKnight </Td> <Td> April 23, 2010 (2010 - 04 - 23) </Td> <Td> SPS113 </Td> <Td> 1.23 </Td> </Tr> </Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr>

How many episodes in season 1 of spartacus