The four Daleks, later identified as the Cult of Skaro , have brought a device known as the Genesis Ark through the breach and declare war on the Cybermen and the two races begin fighting worldwide. Meanwhile, the Doctor has discovered that Jake Simmonds, Pete Tyler, and Mickey - who masqueraded as a Torchwood employee and is with Rose and the Daleks - have been able to travel between the universes. The Cult of Skaro is keeping Rose and Mickey alive because they, being time travellers, would activate the Genesis Ark, which the Daleks are incapable of as it is stolen Time Lord technology. The Doctor plans to open the breach, which will pull in anyone who has crossed the Void including the Daleks, Cybermen, and Rose's family, and then close the breach. Rose refuses to reside in the parallel universe and stays to help the Doctor, but she is unable to hold on and becomes marooned in the parallel universe. The Doctor is able to transmit his image through one of the final breaches, and the two share a tearful goodbye before a mysterious woman in a wedding dress appears in the TARDIS .