Helena Charles is a fictional character from the Doctor Who universe, known for her role as a companion to the Second Doctor, portrayed by Patrick Troughton. She first appeared in the serial "The Faceless Ones" and is characterized by her intelligence and resourcefulness. Helena is a strong-willed individual who often takes charge in challenging situations. In the series, Helena works as a secretary at an airport, which leads her to become involved in the Doctor's adventures. Her interactions with the Doctor and other characters highlight her bravery and loyalty, making her a memorable part of the show's history.