Briggs's freighter

Briggs' freighter was a spacecraft under the command of Captain Briggs. Its cargo, unknown to the crew, was an army of Cybermen. They awoke and took over the ship. They planned to destroy life on Earth by hitting it with the craft that they had reprogrammed. The craft was brought back in time by the Fifth Doctor. It still hit the Earth, killing Adric and causing the extinction of the dinosaurs. (TV: Earthshock)