The Testament of Professor Dowell(1984)

Original title: Завещание профессора Доуэля

For many years, a prominent scientist had been striving to solve the problem of immortality. He shared the results of his daring and risky experiments with his colleagues. But one day something happened that no one could have foreseen: the professor had disappeared. The best student and follower of Professor Dowell tries to use the results of his scientific research for criminal purposes.