Spring Heeled Jack (1) - S1.E6

Part one of two. Robert is tormented by the recent tragedies that have befallen him, causing him to lose control of his transformations. Bulstrode reveals that military intelligence is holding Ravi prisoner, but will release him in return for Robert's help in investigating a series of strange killings. Robert takes on the case, and joins forces a vigilante also on the murderer's trail - but when the truth behind the slaughter emerges, it leads to his new ally becoming a dangerous threat that Bulstrode wants eliminated.