Informer 3838 is an Australian television series focusing on criminal barrister-turned police informer Nicola Gobbo (codenamed informer 3838) and her involvement in the Melbourne gangland killings. It is a spin-off of the Underbelly franchise, with various actors reprising their role from previous series. Commissioned by the Nine Network and produced by Screentime, it was broadcast between 20 and 27 April 2020.