Silent Witness viewers were left scratching their heads over one scene in the latest episode of the BBC programme . Monday night's instalment (March 2) of the crime drama saw Dr Nikki Alexander ( Emilia Fox ) and Jack Hodgson (David Caves) and their fellow pathologists examining what appeared to be the suicide of a British-Chinese pro-democracy activist. The woman's remains were found in water and it was initially believed to be a suicide. However, as Nikki and Harriet Maven (Maggie Steed)