North was sent to spy on the Eighth Doctor and found him at The World's End, a pub in Camden Town. He bumped into the Doctor, planting a listening device as he did so. Outside, North tried to listen to the Doctor's conversation but could only hear him saying he was going to blow up the Houses of Parliament.
Tony and Destri forced North back into the pub, where he told the Doctor he worked for Leighton Woodrow. The conversation was cut short when Cybermen attacked. North called for a rescue helicopter and took the unconscious Doctor with him, leaving the others.