Anatoliy Podshivalov

A scientist builds a time machine and accidentally sends his apartment complex manager and a petty burglar to 16th century Moscow, while Tsar Ivan the Terrible travels to 1973.

The invaders are leaving the northern town of the young Soviet republic. The brave underground activist Alexei Ilyutinsky infiltrates a musical troupe organized to entertain the White Army command and boost the morale of the population. The new horn player, who has no musical ear whatsoever, passes on the White Army's defense plan to the Reds and saves Bolshevik Makeev, the former chairman of the provincial executive committee, from being shot.

In 1921, the Cheka became aware that gold and jewelry were stolen from the treasury of Gokhran, and that a special organization was involved in transporting the stolen to Estonia. Scout Maksim Isayev is sent to this country. He establishes that the cipher of the Soviet embassy Olenetskaya works for the German resident Nolmar, with whom employees of Gokhran Kozlovskaya and an appraiser Yakov Shelekhes are associated. As a result of the provocation, Isayev was arrested. In the prison cell, he finds himself together with the famous Russian writer Nikandrov, who could not find himself in post-revolutionary Russia and went abroad. Released soon by the efforts of his comrades, Isayev continues the struggle for the fate of Nikandrov — for his return to his homeland.

Mycroft Holmes hands Sherlock Holmes the case of the Master Blackmailer.

While on a business trip to Leningrad, engineer Sergei Gushchin meets a young woman and quickly falls for her. Acutely aware of the age difference between the two, the man decides against pursing the relationship.

Dr. Watson executes Sherlock Holmes' will, who faced death after exposing Moriarty and his gang in the previous episode.

A young boy in Cuba finds himself in mortal peril as his fishing village gets infiltrated by malign forces.