Defence Advocate 997 was the defender for the Dastrons during their trial. However, the spacecraft they were on crashed in Dunstanton Lake and, centuries later, the Defence Advocate was re-activated by Freda Mattingly. It later took control of the Ex-Cav suit and had it steal the key to awaken the Dastrons from their suspended animation. (AUDIO: Prisoners of the Lake)
Tardis