"Section D" is the code-name given to the Counter-Terrorism Department of MI 5. The operations, missions and other efforts of this team to protect Great Britain are the focus of the series.
Known Members
Current Members
- Head of Department - Sir Harry Pearce KBE
- Chief of Section & Senior Case Officer - Erin Watts
- Junior Case Officer - Dimitri Levendis
- Junior Case Officer - Calum Reed
Former Members
- Chief of Section & Senior Case Officer - Tom Quinn (decommissioned)
- Chief of Section & Senior Case Officer - Adam Carter (deceased)
- Chief of Section & Senior Case Officer - Ros Myers (deceased)
- Chief of Section & Senior Case Officer - Lucas North (deceased)
- Junior Case Officer - Helen Flynn (deceased)
- Junior Case Officer - Zoe Reynolds (sent into hiding)
- Junior Case Officer - Danny Hunter (deceased)
- Junior Case Officer - Fiona Carter (deceased)
- Junior Case Officer - Zafar Younis (deceased)
- Junior Case Officer - Ben Kaplan (deceased)
- Junior Case Officer - Jo Portman (deceased)
- Junior Case Officer - Beth Bailey (decomissioned)
- Technician & Data Analyst - Colin Wells (deceased)
- Technician & Data Analyst - Malcolm Wynn-Jones (retired)
- Technician & Data Analyst - Tariq Masood (deceased)
- Administrative Officer - Sam Buxton (transferred)
- Administrative Officer - Jed Kelley (transferred)
- Senior Analyst - Connie James (deceased)
- Data Analyst - Ruth Evershed (took another job)