Natasha Alexander was a special operative with UNIT. She had psychic powers from birth and had been raised within UNIT after her parents had proved unable to cope with the demands of a child with such powers. She was called on to investigate UNIT agent Lockwood, whose loyalties were questioned by some after his encounter with the Nestene Consciousness. She began working with Lockwood shortly before the discovery of the escaped Nestene creature on Sentinel Island. There, she helped Lockwood halt the Nestene plans for conquest (HOMEVID: Auton 2: Sentinel). Shortly afterwards, Dr Sally Arnold and Ross Palmer arrived at Millhampton to look for Lockwood. Palmer was also psychic and seemed to have been in a relationship with Alexander. She sacrificed herself to allow Palmer to escape an Auton and reach the captive Lockwood (HOMEVID: Auton 3: Awakening).