Doctor Who - The Sixth Doctor Adventures: Volume One - Water Worlds

Marine biologist, Hebe Harrison (Ruth Madeley) is a brand new friend and travelling companion for Colin Baker as the Sixth Doctor and Bonnie Langford as Melanie Bush. Hebe is part of a survey team on an abandoned North Sea oil rig. As her colleagues disappear one by one, she teams up with the Doctor and Mel to find out what's really happening.