Episode 4

 was the fourth episode of The Accident, which premiered on November 14, 2019 in the UK and on December 13, 2019 in the US.

Synopsis
Harriet is in the dock for gross negligence manslaughter as the families' private prosecution finally arrives in court. Angela and the others have nearly bankrupted themselves to fund the case. Polly fears for Leona, who wants to give evidence, but it's in her relationship with Iwan that she must face the biggest questions.