Colin Frazer was the cousin of Tegan Jovanka.

While holidaying with his friend Robin Stuart, they arrived a day early in Amsterdam in January 1983 and could find no empty hostel room. They decided to spend a night in the abandoned Frankendael mansions. Colin was abducted by the Ergon and forced to help Omega return to corporeal existence. He was later freed by the Fifth Doctor. (TV: Arc of Infinity)

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