Episode list

After two old friends accidentally meet and resolve to become investigators for hire, they quickly become embroiled in a missing treaty and a Bolshevik conspiracy.

Newly married but bored Tommy and Tuppence take over a defunct detective agency and are quickly hired to investigate the case of a stolen pink pearl.

After seeing a suspicious coded message in the newspaper, Tuppence and Tommy attend a masked ball and find a costumed woman dying from a knife wound.

Lois Hargreaves fears for her life. Tommy and Tuppence are called upon but fail to arrive before death's visit.

After a businessman is found dead on a golf course, stabbed through the heart with a hat-pin, the Beresfords try to prove that the accused woman, Doris Evans, is innocent.

A young woman's inherited manor house appears to be haunted, but Tommy and Tuppence try to prove the poltergeist to be corporeal.

The new U. S. Ambassador to Britain confides to the Beresfords that on the voyage there someone substituted another travel bag for his, a bag that only contained his boots.

Monty Jones hires the Beresfords to help him win a bet and break a concocted alibi by beautiful Una Drake, who has agreed to marry him if he can.

The Beresfords investigate the murder of Gilda Glenn, a well-known stage actress, but everyone involved has an alibi.

Gabriel Stavansson ask Tommy and Tuppence to find his fiancée. The Beresfords are then set upon a diabolical mystery at The Grange House.

Scotland Yard recruits the Beresfords to infiltrate an exclusive gambling club and expose the mysterious and ruthless gang of counterfeiters operating there.