The radical forensic techniques of Detective William Murdoch (Yannick Bisson) return to solve the 19th centuries most vexing crimes. The series throws Detective Murdoch increasingly difficult challenges and allows him to explore many new intriguing areas in turn-of-the-century society. Added to this, fresh frustrations in his relationship with his beautiful, brilliant colleague Dr Julia Ogden surface and we are introduced to a new female assistant, Dr. Grace Howard.