<P> A second season premiered on April 1, 2017 on MBS and other television networks . Funimation and Crunchyroll are streaming the second season on their respective websites, with Adult Swim airing a dubbed version . The opening theme song is "Opfert eure Herzen!" (心臓 を 捧げよ!, Shinzō o Sasageyo!, lit . "Dedicate Your Hearts!") by Linked Horizon and the ending theme song is "Yūgure no Tori" (夕暮れ の 鳥) by Shinsei Kamattechan . </P> <P> On June 17, 2017, a third season was announced at the close of the second season's final episode, with a release date slated for April 2018 . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 25 </Td> <Td_colspan="1"> April 7, 2013 (2013 - 04 - 07) </Td> <Td> September 29, 2013 (2013 - 09 - 29) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 12 </Td> <Td_colspan="1"> April 1, 2017 (2017 - 04 - 01) </Td> <Td> June 17, 2017 (2017 - 06 - 17) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

How many episodes of attack on titan are there
find me the text answering this question