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).
Unfortunately the movie The Adventures of Sherlock Holmes and Dr. Watson: The Secret of Treasures is not yet available on HBO Max.
| Directing | Igor Maslennikov | Director |
| Costume & Make-Up | Lyudmila Eliseeva | Makeup Designer |
| Production | Evgeniya Dikhnova | Production Manager |
| Sound | Aleksandr Dmitriev | Conductor |
| Writing | Igor Maslennikov | Screenplay |
| Writing | Arthur Conan Doyle | Novel |
| Editing | Lyudmila Obrazumova | Editor |
| Costume & Make-Up | Nelli Lev | Costume Design |
| Art | Berta Manevich | Production Design |
| Costume & Make-Up | Lila Zavyalova | Makeup Artist |
| Sound | Asya Zvereva | Sound Designer |
| Camera | Yuri Veksler | Director of Photography |
| Camera | Alik Nasyrov | Camera Operator |
| Sound | Vladimir Dashkevich | Original Music Composer |
| Writing | N. Chirskov | Script Editor |
| Directing | Viktor Sergeev | Co-Director |
| Directing | Arkadiy Tigay | Co-Director |
