A girl named Mary Morsten comes to Sherlock Holmes, who asks him and the doctor to help solve the annual receipt of one pearl by her parcel and in the search for her father, who disappeared many years ago. Holmes and Watson do not refuse her help and find out that Miss Mary is the heiress of a huge fortune — the treasures of Agra, which are also claimed by the sons of Major Sholto and Jonathan Small — an escaped convict with a wooden prosthesis instead of a leg, whom the elder Morsten and Sholto deceived (while Sholto also deceived Morsten).

After upsetting the criminal underground in 'the Master Blackmailer' case, Sherlock Holmes has to face his archenemy: Prof. Moriarty.

A young man is passing a series of psychological tests created by his girlfriend's mother.

1986 film directed by Igor Maslennikov

2009年乌克兰STB电视台拍摄制作的三集纪录片，深入回顾了1979—1986年前苏联福尔摩斯系列电影的制作过程和幕后花絮，其中包括很多主创人员的珍贵访谈。IMDB上暂无条目，这部纪录片分为三集：
第一集：初识(Знакомство)
第二集：巴斯克维尔猎犬(Собака Ба скервилей)
第三集：二十世纪伊始(ХХ век начинается)

Olga, is a young intelligent woman who raises a young son. She ends up falling in love with a married man who does not dare to leave his family.

《福尔摩斯与华生医生历险记：阿格拉宝藏》拍摄于1983年，分为2集
上集根据《四签名》改编
下集根据《波西米亚丑闻》改编