Edmund Reid Did This

S4 E7: As a new serial killer plagues Whitechapel, Reid and Drake become convinced that his crimes are being covered up by another party. Together they follow a trail of corruption that leads to the heart of Scotland Yard, and to Assistant Commissioner Dove. But as our heroes prepare their case, Dove discovers a terrible secret from Reid and Drake's past: ammunition for a battle which has only just begun. Jackson and Long Susan, meanwhile, prepare for their escape, but attempts to fence their stolen booty soon send them crashing into Leman Street: their fates once more bound Reid and Drake's.