Dennis and Gnasher: Unleashed - Season 1 Episode 3 -

Dennis and the gang are fed up with dinner lady Olive's completely inedible school dinners. In their mission to 'drop the slop', they discover a poster of her past career as a singer. The gang ask her to join The Dinmakers, hoping she'll swap a life in the kitchen for fame. However, after unleashing Olive's inner diva, their new mission is how to get Olive back into the kitchen!