A Dead Secret is a 1957 play by Rodney Ackland. It is a murder drama set in 1911 London and is based on the Seddon murder trial.

Plot

Insurance agent Frederick Dyson owns a house in London with his wife. Among the lodgers is a misery elderly woman, Miss Lummus, who hoards her money in the house. When she is murdered, Dyson is charged with the crime.