How to watch Cause of Death Series 4 in Australia

Here’s everything you need to know about Cause of Death Series 4—including its premiere date, streaming platform, episode details, and cast lineup, plus a complete guide on where and how to watch Cause of Death Series 4 online.

Cause of Death Series 4 Synopsis

Cause of Death Series 4 follows Dr Richard Shepherd as he uses forensic science to examine the circumstances surrounding sudden and unexplained deaths. Each investigation brings together post-mortem findings, witness testimony and expert analysis to piece together important evidence. The series also speaks with families, investigators and people closely connected to the cases. One major investigation focuses on 19-year-old apprentice bricklayer Jay Slater, who disappeared in Tenerife on June 17, 2024. An inquest ruled his death a tragic accident, but his mother, Debbie Duncan, continued searching for answers two years later. Dr Shepherd examines the medical evidence as Debbie returns to Tenerife to understand more about her son’s final hours. A digital forensic scientist also examines Jay’s phone to reconstruct his final hour of contact and explore the circumstances that led him away from the road near Masca.

When Does Cause of Death Series 4 Premiere?

Cause of Death Series 4 premieres on Wednesday, September 30, 2026, on 5.

Series 4 Cast

• Dr Richard Shepherd — The renowned forensic pathologist returns as the central expert in the series. He examines post-mortem evidence and explains what medical findings can reveal about the final hours before a death.
• Debbie Duncan — Jay Slater’s mother takes part in the investigation into her son’s death. She works with Dr Shepherd while searching for further answers about what happened in Tenerife.
• Glen — Debbie’s brother and Jay’s uncle joins the investigation in Tenerife. He retraces the route the family believes Jay may have taken through the difficult terrain around Masca.

How many episodes are in Cause of Death Series 4?

TVmaze currently lists five episodes as ordered for the new run, although detailed public listings are not yet available for every episode. Episodes 1, 2 and 3 are currently listed for September 30, October 7 and October 14, respectively.

What happened to Jay Slater?

Jay Slater was a 19-year-old apprentice bricklayer who disappeared in Tenerife on June 17, 2024. His body was later discovered in difficult terrain near Masca, and an inquest concluded that his death was accidental following a fall from height.

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Cause of Death Series 4 Trailer

FAQs

• Who is Dr Richard Shepherd in Cause of Death Series 4?
  Dr Richard Shepherd is a forensic pathologist who conducted the UK post-mortem examination of Jay Slater.
• Is Cause of Death based on real cases?
  Yes. Cause of Death is a factual documentary series built around real deaths and forensic investigations.

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