Prison guard (The Forgotten)

The Prison Guards were a force active during the Last Great Time War. The guards controlled a prison which had prisoners from across time and space, such as the Malmooth Chantir and a Sea Devil. They also guarded the Great Key.

The Doctor infiltrated the prison in order to take back the Key. After several months of imprisonment, he faked his death and then overpowered the guards when they checked on him. He was then able to take back the key, free the other prisoners and escape the prison. (IDW: The Forgotten)