Overview
The film is based on real events and reveals the tragic episodes from the life of the Austrian biologist scientist-materialist Paul Kammerer (1880-1926), hunted by regressive scientists and Catholic reactionaries who committed suicide.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 43 | October 7, 1964 (80) | |
 | 27 | January 1, 1962 (61) | |
 | 23 | February 16, 1968 (63) | |
 | 26 | November 1, 1945 (44) | |
 | 37 | December 23, 1957 (66) | |
 | 26 | June 8, 1929 (27) | |
 | 39 | March 15, 1952 (63) | |
 | 48 | December 31, 1942 (62) | |
 | - | - | |
 | 52 | December 26, 1933 (58) |