Sarah Lam is a British-Chinese actress who portrayed General Shan (acknowledged simply as Opera Singer in the end credits) in Sherlock. She played Susannah in the sitcom No Problem!, Linda Mo in Angels, Anna Lee in Howards' Way, and Caroline Choi in Brookside. Other TV credits include: Two Thousand Acres of Sky, The Chinese Detective, C.A.T.S. Eyes, A Very Peculiar Practice, The Adventure Game, Virtual Murder, Inspector Morse, The Bill, and Holby City. Sarah Lam was involved in the 2013 production The World of Extreme Happiness at the National Theatre.