Andrus Hagan was a male Betazoid science advisor for the 24th century United Federation of Planets. In 2367, he was assigned to work for Starfleet aboard the starship USS Brattain. When the Brattain fell prey to a Tyken's Rift in 2367, her Human crew eventually went insane and killed each other due to the lack of being dreaming. In contrast, he had nightmares he could not control, and therefore got little sleep. The visions he saw were actually telepathic messages from a ship trapped inside the Rift, however, he was not able to understand it or get the crew to take action on it. He became the sole survivor, but almost catatonic.