sidekick. Rasmus Hardiker as Walter Brown, Dennis' arch-enemy and Grizzly Griller, an explorer who is a Bear Grylls parody. Ryan Sampson as Peter "Pieface" Shepherd. One of Dennis' best friends and with a rather odd personality and has a pet potatoe, Paul. Kathryn Drysdale as Jemima "JJ" Jones. The most fearless girl of Dennis' friends who always tells Dennis stories that her big brothers have told her, even though they may not be true. Kelly-Marie Stewart as Rubidium "Rubi" von Screwtop. The smartest of Dennis' friends and uses a wheelchair, as does her voice actress. She is very good at making plans. Her father is the scientist Professor von Screwtop, who first appeared in the Lord Snooty strip in the 1940s. Joanna Ruiz as Mrs Creecher, Gran and Anne Finally - a journalist whose name is a play-on the words "And finally...". Maya Sondhi as Miss Mistry, who joined Bash Street School as a new teacher in Series 2. Production The series was first announced on 8 June 2016, when The Beano announced they were setting up a business dedicated to media based on The Beano. Dennis & Gnasher: Unleashed! will be their first production. On 5 October 2016, it was officially announced that the series would air on CBBC in 2017 and the first-ever picture of Dennis in CGI was released. On 17 March 2017, Freddie Fox was announced to be voicing Dennis, a clip of the series was also released. On 3 July 2017, Rasmus Hardiker, Ryan Sampson, Kathryn Drysdale, Kelly-Marie Stewart and Joanna Ruiz were all added to the voice cast and another clip was released. The series was announced for a second installment on 12 February 2019, after the success of the first. Dennis & Gnasher: Unleashed! season one received nominations at Kidscreen, the British Animation awards and was nominated for an International Emmy. The music for the series was composed by Rob Lord and Graham Kearns and the theme tune was performed by The Vaccines. Episodes Series 1 (2017–18) Series 2 (2020–21) Reception In its first week, it was the highest rated show on CBBC and overall the 10th most-watched programme for 6-12 year olds alongside The X Factor and Strictly Come Dancing. References External links 2017 British television series debuts 2010s British children's television series 2010s British animated television series 2020s British children's television series 2020s British animated television series British children's animated comedy