Ortega

The Ortega was a spacecraft which visited the planet Orriv in pursuit of the Network, a psychic entity which had wiped out the planet’s population. The Network killed and possessed the crew before the Tenth Doctor devised a way to contain the Network and confronted it. Recognising the Network had become a murderer due to being inadvertently tormented, the Doctor offered to get it help if it allowed him to contain it. As he returned to the ship, the Doctor heard a broadcast from the Eighth Doctor on behalf of the Tenth Justice Fleet, warning people away from Orriv. Though tempted to respond after realising the events of the Kotturuh crisis and Time War that his younger self was about to endure, the Tenth Doctor chose not to. (AUDIO: Echoes of Extinction)