Country squire Marcus Waverly calls on Poirot for help in dealing with kidnap threats against his son. Hastings is appalled by the thought of someone going around kidnapping children ("Damn it all - this is England!") and it becomes a race against time to find out who the mystery letter writer is.

The episode was rated 7.55 from 292 votes.

Poirot is called in to help a woman who lives in fear of her husband, and he is invited to a dinner party which goes horribly wrong.

The episode was rated 7.55 from 144 votes.

Hastings and Poirot are playing Monopoly when they are interrupted by Lord Pearson, the elegant Chairman of the London and Shanghai Bank. The banker asks them to investigate the disappearance of a Mr Ling - a highly-valued customer who before he went missing had arranged to sell Lord Pearson a map showing the location of a long-lost silver mine. Ling is found murdered, a young stockbroker is implicated, and Poirot has to untangle a complicated plot.

The episode was rated 7.54 from 187 votes.

Japp (who is really worried that failure could cost him his job) seeks Poirot's help in investigating a series of jewel thefts, and two remarkable things happen. Poirot falls in love (with the beautiful and clever Countess Vera Rossakoff) and he also meets a criminal intellect which he finds worthy of him. As the countess is his main suspect, Poirot spends most of his time with her - which for once leaves Hastings and Miss Lemon to do most of the actual detective work. In the end, this case may have to be put down as the one that got away.

The episode was rated 7.54 from 128 votes.

At a London restaurant where he often eats, Poirot notices that another regular customer has dramatically changed the food he eats. Meanwhile, as old Anthony Gascoigne lies dying in Brighton, his estranged twin brother, Henry, falls to his death. A tragic accident, or murder? Poirot begins to see connections and decides the answer to the mystery lies in a blackberry pie.

The episode was rated 7.52 from 277 votes.

Millionaire business man Benedict Farley, a well-known eccentric, consults Poirot about the bad dreams he has been having - he has dreamed repeatedly of killing himself. Sadly, he does not follow some good advice Poirot gives him. When Farley is found dead, Poirot fails to believe in suicide and suspects a murder plot relying on hypnosis.

The episode was rated 7.50 from 215 votes.

Poirot calls to see the veiled lady of the title (Lady Millicent Castle-Vaughn) at her London hotel. Lady Millicent is about to be married, but a mean blackmailer called Lavington has got hold of a love letter she wrote years before to another man. Lavington wants twenty thousand pounds, and Poirot makes up his mind to recover the letter himself, even if it means impersonating a Swiss locksmith.

The episode was rated 7.47 from 177 votes.

Marie Marvelle, a Belgian film star, receives threatening letters from a Chinaman which demand her famous diamond, the Western Star. Marie visits her old friend Hercule Poirot in London, seeking his help, and Poirot tackles the case with relish.

The episode was rated 7.44 from 153 votes.

Lovely young actress Valerie St Clair, engaged to marry Prince Paul of Maurania, is the only witness to the murder of Henry Reedburn, a shady and overbearing producer. Prince Paul appeals to Poirot to save Valerie from police suspicion, and the great detective finds he has a conundrum to ponder on - 'When is a murder not a murder?'

The episode was rated 7.37 from 221 votes.

Poirot tells a surprised Hastings he's decided to retire and suggests they take a holiday in the Lake District. On the way, Hastings befriends a young woman who is missing a collection of valuable miniatures. The case involves a famous writer and a beautiful woman in a sports car, and to the relief of Hastings Poirot's thoughts of retirement soon seem far away.

The episode was rated 7.31 from 185 votes.