1x4 - The Frankenstein Chronicles

Marlott takes a terrified Pritty on their assignation to meet the men who kill for money – they find themselves in the tunnels under Smithfield market, which run from the Fortune of War pub to St Bart's Hospital. Flora has returned to Marlott's lodgings, but now she is back Marlott intends to use her as bait for the murderous gang, much against Nightingale's wishes.