Tatiana Pochenko

In the L'Homme au complet marron episode of TV series Les Petits Meurtres d'Agatha Christie, Tatiana Pochenko is a famous Russian ballerina who during the events in the episode is performing as a guest artiste at the Lille Opera.

As the plot unfolds, she is also revealed to be a Russian spy who has been given a mission to courier some microfilms back to Moscow. For this purpose, she had hidden the microfilm cartridges in one of her ballet shoes. It would later become apparent that Tatiana is an unwilling operative, and forced to work for Russian intelligence only because the authorities in Moscow threaten to take reprisals against her mother if she does not. In the course of the episode, she and her brother Sergueï Pochenko contemplate defecting over to the French secret service but they fear "The Colonel", a Russian masterspy whose true identity they do not know. "The Colonel" gets wind of the planned defection and Tatiana is murdered early on. Her dressing room is searched for the microfilms but they are not found.

There is also a side plot which intertwines only loosely with the main espionage theme. Tatiana is a temperamental dancer and clashes often with the choreographer at the Lille Opera Patrick Mallet. After Tatiana is murdered, a young dancer Lisa Bonfanti angles to take her place on stage.

Of all the characters in the adaptation, Tatiana is one of the few characters with a close parallel from the original Christie novel. She may be considered a parallel of Anita Grünberg alias Nadina. They are both dancers, both plan to double-cross or betray "The Colonel", both are killed for something "The Colonel" wants, and the object in question in both cases relate to films. The motives are however wholly different, as are the actual objects which are sought. In the original, they are diamonds hidden in a film cartridge. In the adaptation, they are actual espionage microfilms.

Tatiana Pochenko is portrayed by Marie Céline.