<P> Each series is made up of 26 episodes split into two 13 - episode parts for transmission . The first series premiered between 4 April -- 20 June 2015 , resuming on 31 October 2015 and concluding on 23 January 2016 . A second series was announced on December 18 , 2014 and broadcast between 22 October 2016 -- 7 January 2017 and 30 September -- 16 December 2017 . A third series was confirmed on 5 May 2016 and premiered on 31 March 2018 . </P>
<P> Each series is made up of 26 episodes split into two 13 - episode parts for transmission . The first series premiered between 4 April -- 20 June 2015 , resuming on 31 October 2015 and concluding on 23 January 2016 . A second series was announced on December 18 , 2014 and broadcast between 22 October 2016 -- 7 January 2017 and 30 September -- 16 December 2017 . A third series was confirmed on 5 May 2016 and premiered on 31 March 2018 . </P>
when does the new series of thunderbirds start
when does the new series of thunderbirds start
31 March 2018
31 March 2018