of Torchwood was supposedly kept even from Prime Minister Harriet Jones (Penelope Wilton) and the UN. However, Jones did know about its existence anyway, and ordered Major Richard Blake (Chu Omambala) of UNIT to prepare Torchwood for the impending arrival of the Sycorax on Christmas Day. On the command of Prime Minister Harriet Jones, Torchwood used the Jathaa sunglider weapon to destroy a Sycorax ship on Christmas Day 2006. 2007–2012 The Doctor discovered the existence of Torchwood in the 2006 series' two-part finale, "Army of Ghosts" and "Doomsday" set in 2007. At this time, Torchwood operated software which blocked access to Internet searches about UFO activity ("School Reunion"). The TARDISODE for "Army of Ghosts" showed Torchwood agents abducting a journalist who was investigating the Institute and arranging to admit him to a psychiatric institution. While investigating the manifestation of "ghosts" on Earth, the Doctor traced their origin back to Torchwood Tower, known publicly as One Canada Square, where Yvonne Hartman (Tracy-Ann Oberman) placed the Doctor in custody and confiscated the TARDIS. To Torchwood, the Doctor was a source of vast information and familiarity with alien technology, which they could exploit to further the organisation's aims. Torchwood Tower had been built to reach a spatial breach 660 feet above sea level. Unbeknownst to Torchwood, the breach had been caused by the entrance into the universe of a "void ship", a vessel designed to travel through the void between parallel universes. Torchwood had been conducting experiments on the breach, in an attempt to harness its energy and reduce Britain's reliance on Middle Eastern oil, but these experiments had caused the breach to widen. The "ghosts" turned out to be Cybermen from an alternate universe, which were using the widening breach to travel between universes. A small advance force of Cybermen infiltrated Torchwood, "upgrading" or subverting Torchwood personnel, before eventually seizing control and opening the breach wide enough for ghost-like creatures around the world to manifest fully as millions of Cybermen. However, the void ship had nothing to do with the Cybermen and had in fact been created by the Daleks (voiced by Nicholas Briggs), four of whom had used it to escape the Time War. Caught between warring Daleks and Cybermen, many Torchwood workers were either killed or "upgraded" to Cybermen (including Hartman herself—although she retained some semblance of her identity). In the wake of these events, referred to as the "Battle