Briggs's freighter

Briggs' freighter was a spacecraft under the command of Captain Briggs. It's cargo, unknown to the crew, was an army of Cybermen. They awoke and took over the ship. They planned to destroy life on Earth through hitting it with the craft that they had reprogrammed. The craft was brought back in time by the Doctor. It still hit the Earth and wiped out the Dinosaurs. (DW: Earthshock)