Cameron Lawther

 was sonar expert. The army funded his post-Doc researches. He showed Alistair Gordon Lethbridge-Stewart where he heard the haunting. During a test of the stealth engine he was affected by memories of the past. (AUDIO: Way of the Burryman) He was given some leave after the last run of the stealth engine. He was then cyberconverted and his knowledge was used by the Cybermen concerning the submarine. (AUDIO: The Forth Generation)