It's Judge Smudge's birthday, and he wants Margaret to organise a surprise birthday party. Meanwhile, Strictly's Dianne Buswell helps him with the case of the twerking mum.
Judge Smudge is not happy about having to take his annual bath. Broadway and West End musical actress Sierra Boggess joins Smudge for The Case of the Unloved Show Tunes.
Margaret is annoyed after Judge Smudge rigs the entire building with booby traps. Judge Smudge enlists some surprise witnesses to help with the case of the singing dad.
Judge Smudge hears the case of the mums who keep pranking their children, and the brother who makes his sister get his football when he kicks it over the fence.