An investigation into the mysterious world of the crime novelist Agatha Christie, with comments from poison experts, policeman and pathologists and members of her family.
| Actor | Role |
|---|---|
 Michael AspelSelf - Host | Self - Host |
 Angela LansburySelf - Actress | Self - Actress |
 David SuchetSelf - Actor | Self - Actor |
 Peter UstinovSelf - Actor | Self - Actor |
 Agatha ChristieSelf - Writer (archive footage) | Self - Writer (archive footage) |