”It CANNOT be my fault! That's impossible!” - S3.E5

The time has come for Kalle and Brita to finally finish the sauna they have struggled to build. But someone has measured the entrance door wrong and it does not fit. The question is who is to blame…? Also, Kalle builds the sauna seating and Brita paints 300 000 stencils on the walls of the sauna.