<P> This is a list of episodes for the series Wild Kratts . Some episodes focus on an environmental problem, while other episodes have a villain . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th_colspan="2"> Original air date </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 40 </Td> <Td> January 3, 2011 (2011 - 01 - 03) </Td> <Td> October 25, 2012 (2012 - 10 - 25) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 26 </Td> <Td> October 15, 2012 (2012 - 10 - 15) </Td> <Td> January 31, 2014 (2014 - 01 - 31) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 26 </Td> <Td> April 7, 2014 (2014 - 04 - 07) </Td> <Td> July 22, 2015 (2015 - 07 - 22) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 26 </Td> <Td> July 29, 2015 (2015 - 07 - 29) </Td> <Td> April 14, 2017 (2017 - 04 - 14) </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 20 </Td> <Td> July 24, 2017 (2017 - 07 - 24) </Td> <Td> TBA (TBA) </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 20 </Td> <Td> TBA (TBA) </Td> <Td> TBA (TBA) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th_colspan="2"> Original air date </Th> </Tr>

When was the first episode of wild kratts