Made of Steel (novella)
[2][3] Returning from the Cretaceous period, The Tenth Doctor and Martha Jones journey to the present day, where Cybermen have been teleporting into labs and stealing technology.The Doctor takes Martha back to the Royal Hope hospital, where they have a confrontation with a pair of Cybermen in the car park.At the Army Base, the Doctor realises that the Cybermen who were made on Earth, not the parallel universe (and were therefore not sucked into the void) having been using teleportion devices stolen from the Torchwood building, to help them gather enough technology to create a portal capable of reopening The Void and release the Cybermen trapped inside.Just as Martha is about to tell him where she is, the Cyberleader snatches her phone and destroys it, then plans an attack on the Army Base where the Doctor is being held.Having retrieved his TARDIS from the base, the Doctor manages to materialize right inside the Dome but the Army cannot enter due to a force-field set up by the Cybermen.