Inspector Jack Robinson is a senior detective inspector in Melbourne’s Criminal Investigation Department during the 1920s. Serious, disciplined, and highly respected, Jack is dedicated to solving crimes and maintaining order, though he occasionally finds himself frustrated by Elizabeth Fisher’s unconventional methods.

Despite their very different personalities, Jack and Elizabeth develop a strong professional partnership and a deep mutual respect. Beneath his reserved exterior, Jack is compassionate, loyal, and protective of those he cares about. His growing feelings for Elisabeth add a subtle romantic tension to their relationship throughout the series.