Liam Barnaby

 was a captain in the Earth Empire military during the Orion War in the 26th century. Admiral Karen Brett made him her Commander-in-Chief after President Duncan Levinson's assassination. (AUDIO: Scorpius) He became suspicious of Paul Hunt and lost his job because of his investigations. (AUDIO: Fear) He accompanied Samantha Thorn to a Cyberman conversion ship, where she stopped him from being converted (AUDIO: Conversion) and later then to Telos. He saw the futility of the Orion War and joined forces with the androids to stop the Cybermen. (AUDIO: Telos)