New Tricks: Queen and Country

Sandra reopens an investigation into the suspected suicide of a Foreign Office diplomat, whose body was found in a frozen London lake after she had suffered the personal tragedy of a miscarriage and the professional embarrassment of having a government laptop stolen from her home. The woman's fiance and twin sister both believe her death is connected to sensitive information held on the missing computer and blame her boss for her downfall - and when Sandra clashes with the man himself, it only makes her more determined to pursue the conspiracy theory, despite Strickland's advice to tread carefully. Simon Day and Sharon Small guest star