Thatcher's role as Reid's man on the inside of Leman Street finally comes good as a lead on the whereabouts of Nathaniel Dove lands in his lap. The race is on to track him down, but will Augustus Dove react quickly enough to cover the tracks? Meanwhile, Jedediah Shine discovers the key to unearthing Reid from his Whitechapel hideout - but he's going to need Drummond's help if the plan is to work.