1) Torchwood episode 
In the episode, Ianto Jones (Gareth David-Lloyd) is revealed to secretly house his girlfriend, Lisa Hallett (Caroline Chikezie), a half-converted Cyberman, in the basement of the Torchwood Hub. Ianto wants to turn her into a human again, but by doing so her Cyberman influence takes control, and the rest of the team must stop her before she could b...