Mr. Fortescue, owner of a big company, unexpectedly dies. The autopsy shows that he has been poisoned. Nobody actually loved him, and even his family members had their reasons to kill him. But who really did it? And who is responsable for killing his young servant and his wife within the next couple of days? Of course the only person who can answer this question is Ms. Marple. And of course, the murderer is the person you least expected it to be.
Unfortunately the movie Secret of the Blackbirds is not yet available on Disney Plus.
| Directing | Vadim Derbenyov | Director |
| Writing | Valentina Kolodyazhnaya | Screenplay |
| Art | David Vinitsky | Production Design |
| Writing | Yelizaveta Smirnova | Screenplay |
| Sound | Viktor Babushkin | Original Music Composer |
| Writing | Andrey Makarevich | Lyricist |
| Visual Effects | Albert Rudachenko | VFX Artist |
| Visual Effects | Viktor Zhanov | Visual Effects Camera |
| Costume & Make-Up | P. Kuzmina | Makeup Designer |
| Camera | Yuri Ulanov | Camera Operator |
| Costume & Make-Up | Svetlana Bashlykova | Costume Design |
| Sound | Rem Sobinov | Sound Director |
| Camera | Nikolay Nemolyaev | Director of Photography |
| Sound | Andrey Makarevich | Playback Singer |
| Writing | Izrail Tsizin | Script Editor |
| Sound | Oksana Shabina | Playback Singer |
| Sound | Konstantin Krimets | Conductor |
| Sound | Arseniy Lapisov | Music Editor |
| Writing | Agatha Christie | Novel |
| Editing | Alla Abramova | Editor |
| Writing | Vasiliy Voinov | Script Consultant |
| Directing | Arnold Ides | Assistant Director |
| Production | Boris Gostynsky | Executive Producer |