Gareth (The Age of Steel)

Gareth was the fiancé of Sally Phelan, a woman who was transformed into a Cyberman. They were going to be married the day after Jackie Tyler's birthday, though the events of Rise of the Cybermen and The Age of Steel interfered with this. While his fate is never explicitly stated, he was almost certainly either 'upgraded' or incinerated. (TV: The Age of Steel)