The third chapter in the Enola Holmes film series has just received another thrilling update, this time detailing who else will be joining the youngest Holmes on another mystery-solving journey. It was announced just a week ago that Enola Holmes 3 began filming at Shepperton Studios in the U.K. Of course, Millie Bobby Brown is already expected to return as Sherlock Holmes’ (Henry Cavill) younger sister. However, it wasn't clear at the time who else would be returning. Now, Netflix is gradually providing more details about the upcoming film, including which characters viewers should expect to be on their screens again.