Zack Paterson is portrayed as a quiet and observant individual, preferring to operate from behind the scenes rather than taking a direct role in events. This reserved approach makes him particularly effective in his position as an informant for William James Moriarty.

He demonstrates strong skills in deception and subtlety, able to maintain a low profile and avoid raising suspicion. During the operation to recover evidence against Commissioner Arterton, Paterson successfully aided Bonde without alerting his former partner, George Lestrade.

Zack Paterson is a tall man with short black hair and dark green eyes, often seen wearing thin-framed, square-lensed glasses. His typical attire consists of a dark blue three-piece suit paired with a purple tie, giving him a composed and professional appearance.

Through his position at Scotland Yard, Zack Paterson plays a crucial role in supporting William James Moriarty by providing critical information on ongoing investigations. Moriarty notes that Paterson’s value to their cause significantly increased after his promotion from a regular investigator to Chief Inspector of the Criminal Investigation Department, as having an ally within the upper ranks of Scotland Yard offers a major advantage in accessing sensitive information.

In addition to his work for Moriarty, Paterson secretly serves as an informant for MI6. He monitors William’s activities and reports his findings to Albert James Moriarty. Following William’s disappearance and Albert’s resignation from MI6, Paterson remains committed to the organization, continuing to work diligently for MI6 alongside other members of Moriarty’s faction.

William James Moriarty
Paterson serves as a trusted informant for William within Scotland Yard, providing valuable intelligence to aid Moriarty’s plans. Their relationship is based on mutual benefit, with Paterson playing a key role in accessing confidential information from within the police force.

Albert James Moriarty
In addition to supporting William, Paterson acts as a contact for MI6 under Albert’s leadership. He reports William’s movements to Albert, maintaining a delicate balance between loyalty to both brothers and the larger goals of their organization.

George Lestrade
Paterson was previously partnered with Lestrade before Lestrade’s dismissal following the Arterton scandal. Despite working closely with him, Paterson successfully concealed his true allegiance, never arousing Lestrade’s suspicions during his covert operations.

James Bonde
Paterson has a friendly working relationship with Bonde. He once sought Bonde’s help for his dry skin issues, resulting in an amusing situation where he received more skincare products than he could possibly use.