Tommy and Tuppence Beresford, restless for adventure, solve cases using fictional detective styles of the 1920s within a framework of Russian spies, codeword 16, kidnappers to outwit.
1 Pink Pearl - Thefts in rich country houses follow visits of kleptomaniac Lady Laura and French maid Elise
2 Finessing the King - Sir Arthur mourns wife killed at costume ball as Queen of Hearts, apparently by their best friend Captain Hale, dressed in newspaper.
3 Man in the mist - Actress Gilda Glen, brainless beauty, beaten upstairs after new lover Reilly leaves, stolid policeman appears suddenly from fog.
4 Crackler - American Hank P. Ryder assists tracking counterfeit bills from gambling Laidlaw couple, lovely Margeurite.
5 Sunningdale - Miss Dora Evans ran from Mr Sessle, found later stabbed in his distinctive green coat, after meeting lady in brown coat on golf course.
6 House of Lurking Death - Rich young Miss Lois Hargreaves consults pair over worries, dies next day from ricin, as does parlormaid, and suspect, heir Dennis Radclyffe.
7 The Unbreakable Alibi - Blonde Australian lovely Una Drake bets rich Montgomery Jones he cannot break her alibi, being two distant places at the same time.
8 Ambassador’s Boots - American Ambassador Randolph Wilmott has kitbag replaced after shipboard mixup. Nothing is missing and Senator Ralph Westerham denies losing his.