Cyberwoman
S1, E4: Ianto Jones is hiding a terrible secret beneath the Torchwood building, but when the situation gets out of control, Ianto is forced to come clean to the Torchwood team who must then fight for their lives.

S1, E4: Ianto Jones is hiding a terrible secret beneath the Torchwood building, but when the situation gets out of control, Ianto is forced to come clean to the Torchwood team who must then fight for their lives.