The quartet was prepared for another fire attack, but don't suspect Tuinman and Sam, who pretend to fumigate the place as pest exterminators. Only Babs was upstairs, the others are nitrogen-affected unconscious without memory so the fiend can search unnoticed, but Cara's herbs help revive them. She believes Sam is the fifth, as he secretly tipped her off upstairs. As the others disagree, she accompanies Arne on his search for him among persons on the estate sharing their birth date. Tuur is told info on the archery may be found in the museum archives. Tuinman tricks the quartet by saying it's in the basement, then orders Sam to help lock them in and start a fire. Transformed back into the blacksmith, he takes Sam along to set fire to the kids' things and the pastory. Sam however returns trying to let them out, but lacks the key. Arne decides not to wait and search for another exit trough the smoke despite approaching flames.