Ruth Gemmell is an English actress who has portrayed two characters on Silent Witness. She portrayed DC Kerry Cox in Series 1 and Ellie Brooke in the Series 17 episode Undertone. Other notable roles include Debra Dean on Eastenders, Carly Beaker in Tracy Beaker's Movie of Me and two separate characters in Waking the Dead; DI Jess Worral and Linda Cummings.

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