What actors and actresses appeared in Kod Londona - 1968?

You are likely referring to the film "The London Affair" (1968), also known as "Kod Londona" in Polish. This film was directed by Polish filmmaker, Janusz Morgenstern.

The cast of the film includes:

* Andrzej Seweryn as Piotr

* Elżbieta Czyżewska as Janina

* Daniel Olbrychski as Jurek

* Teresa Tuszyńska as Teresa

* Leon Niemczyk as Staszek

* Tadeusz Łomnicki as Janina's father

* Wojciech Pszoniak as Jerzy's friend

Please note that this is not an exhaustive list and other actors may have had smaller roles in the film.