MI5 Director General. Attends a concert where he survives Francis Warrender's assassination. Interrogates Harry at headquarters and offers himself as a hostage to Adem Qasim. Eventually allows Harry to escape after confirming his suspicion about the internal traitor.
Harry operates under the authority of Mace while pursuing an unauthorized investigation.
Harry is head of Section D while Mace is the MI5 Director General, and Mace participates in the effort to bring Harry in.
Will acts within an MI5 chain of command led by Mace.
Mace directs the effort to bring Harry in, while Will is tasked with locating Harry.
Qasim directly threatens Mace during the headquarters assault.
Qasim bursts into MI5 headquarters with armed men, and Mace offers his life if Qasim spares the others.
They occupy senior positions within the same intelligence organization.
Maltby is MI5 Deputy Director General, while Mace is MI5 Director General, and both participate in interrogating Harry.
They are senior officials present at the same security event.
Mace and Warrender attend the concert with British intelligence chiefs and NATO officials.
Both are involved in the MI5 headquarters operation.
Calum is among the personnel present at MI5 headquarters when Mace is interrogating Harry.
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