No-nonsense New York journalist, Joe Nocera investigates a strange 100-year-old British murder case featuring poisoned scones and weedkiller. How did the case, and others like it, inspire the bestselling writer of all time: Agatha Christie?

Content Warning: This series depicts some real and fictional crimes and contains descriptions of violence. It also discusses mental health and the theme of suicide in detail which some listeners may find upsetting.

If you have been affected by any of the themes in the series please find links to organisations that can help you below:

Samaritans - call 116 123 or email jo@samaritans.org or jo@samaritans.ie.

You can also call the Samaritans Welsh Language Line on 0808 164 0123 (7pm–11pm every day).

National Suicide Prevention Helpline UK - Offers a supportive listening service to anyone with thoughts of suicide. You can call the National Suicide Prevention Helpline UK on 0800 689 5652 (open 24/7).

SANEline - If you're experiencing a mental health problem or supporting someone else, you can call SANEline on 0300 304 7000 (4.30pm–10.30pm every day).

Campaign Against Living Miserably (CALM) - You can call the CALM on 0800 58 58 58 (5pm–midnight every day) if you are struggling and need to talk. Or if you prefer not to speak on the phone, you could try the CALM webchat service.

Survivors of Bereavement By Suicide - www.uksobs.org

Other international crisis helplines can be found at www.befrienders.org.