Lostar was a fanatic on Aoris who worshipped Machina. He initially rescued the Fourth Doctor and K9 Mark II but the Doctor returned to Drang in order to allow Lostar and Tyrus to escape. When Romana II arrived in Era 24, he took her to Machina. (AUDIO: The Paradox Planet)

He helped the Doctor escape from Drang again by providing a distraction with K9. He was killed by Drang. (AUDIO: Legacy of Death)

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