Kazmierz Dziewanowicz's hobby is very strange. He collects people who were born on the 29th of February. One day he sees that in his collection there are two men with the same name, the same birth place, the same date of birth and the same parents. In the middle of the night somebody kills him. The Intelligence Agency begins investigation.
Elżbieta Brylska

Engineer Henryk Nowak

Sergeant Jan Dziewanowicz

Greengrocer Henryk Nowak

Major Olecki

Kazimierz Dziewanowicz

Helena Pyrzyk

Stefan

Wacław Kaczmarek

Major Bolesław Sarnicki

Tomasz

Kazimierz's Friend

Grzegorz

Staszek

Sergeant Jagielski

Hanka Michałko

Minute-Taker (uncredited)

Market Seller (uncredited)

Plane Pilot (uncredited)

Greengrocer's Neighbour (uncredited)

Porter (uncredited)

Tomczyk (uncredited)

Pilot (uncredited)
Bus Conductor (uncredited)
Soldier unloading the Truck (uncredited)

Soldier giving information to Olecki (uncredited)
Kabera (uncredited)
WSW Major (uncredited)

Soldier woken up by Olecki (uncredited)

WSW Agent (uncredited)

(uncredited)

Guard (uncredited)
Lab Technician (uncredited)
Dziewanowicz's Neighbour (uncredited)
