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Hoping to cover up her own misdeeds, Servalan (Jacqueline Pearce) betrays her confederate, Travis (Brian Croucher), putting him on trial for his life. Meanwhile, Blake (Gareth Thomas), consumed with guilt over the death of the Gans, has exiled himself on a supposedly dead planet. The climax finds Avon (Paul Darrow) mounting a rescue attempt that will profoundly affect both Blake and Travis. "Trial" was first broadcast on February 13, 1979.