28 mins | Drama | Oct. 31, 1973
28 mins | Drama | Oct. 31, 1973
| Producers | Zespól Filmowy "Tor" |
| Original title | Hipoteza |
| Directors | Hanna Kosinska, Maciej Falkowski, Joanna Kos-Krauze, Krzysztof Zanussi |
| Writers | Krzysztof Zanussi |
as Professor N.
as Student / Worker / Patient / Painter
as Professor's Wife
as Fuhrman