ITV has shared online an exciting preview video for next week's episodes of Dark Heart, starring Tom Riley as DI Wagstaffe. Episode 3 will broadcast on Wednesday 7th November at 9pm on ITV, and episode 4 can be seen 9pm on Thursday 8th November.
DI Will Wagstaffe and his team investigate the mysterious death of a young nurse on the London Underground. Whilst CCTV reveals the victim fleeing an invisible assailant, forensics find a DNA link to a missing teenager presumed dead for seven years. Aided by his new team DS Rob Mullan, DC Ray Monk, DC Annie Webb and pathologist Dr Luke Paul, Staffe unpicks a bond of secrets and betrayals which leads him straight into the dark underbelly of the city.