Cast members have gathered in the U.K. as production gets underway. Here's what you need to know about the next installment.

Move over, Sherlock And Daughter, the original plucky young female Sherlock Holmes protégé is coming back. On Tuesday, Netflix announced that Enola Holmes 3 starring Millie Bobby Brown is in production.

Helena Bonham Carter is also among the cast returning for the threequel, now in production for the streaming giant.