Zoe Reynolds only ever wanted to work for MI5, however, her confidence and love of the job took quite a beating. She had always looked up to and greatly admired Tessa, and it was a massive blow to discover she was corrupt; which left her distraught when Zoe was very much involved in her downfall. Zoe once again went through a similar hard time when Tom was alleged to have been a rogue officer, and her confidence took an even bigger beating when she and the rest of the team managed to clear his name, only for him to be decommissioned shortly afterwards.