Dark Heart: Season 1, Episode 4

1 - 4: Episode 4

As the team delves deeper into the poisonings, it quickly becomes clear that those responsible have a powerful influence. The pressure builds for DI Wagstaffe to find buried links between Sofie Cerna and Nick Kyriacou, but when the investigation veers close to home, he finds himself making his sister's fiancé Paulo an offer that could have far-reaching consequences. Crime drama, starring Tom Riley.