Franz visits his father and tells him that he works for the Allies. He asks him to help him sabotage the torpedo tests. In order to include Kurkowski in the secret homing torpedo program, he convinces Engel that the Polish engineer is a valued expert on this part of the bay. At the same time, Franz learns that the SS is looking for Lotta in connection with Kurt's death. He immediately warns her and asks her to escape from Gdynia.