Season 1 CBBC , 2011 Season 2 CBBC , 2013 Season 3 CBBC , 2014 Season 4 CBBC , 2014 - 2015 Season 5 CBBC , 2015 - 2016 Season 6 CBBC , 2016 - 2017 Season 7 CBBC , 2018 Season 8 CBBC , 2018 - 2019