The first challenge for the 10 amateur miniature-makers is to create miniature busts of themselves, before being split into teams to design and make a Regency-themed dining room, complete with tiny food.
Miniaturists tackle art deco design to create miniature toiletries befitting a 1920s bathroom. The two winners of this first challenge will lead the next test building the bathroom itself including a bath with running water.
Miniaturists channel their inner child to create a Victorian nursery containing a pram, a puppet theatre, a rocking horse and a doll's house replica of the mini mansion.
It's the semi-final and the four remaining miniaturists create a Georgian kitchen complete with a full range, mangle and an array of accessories and items to fit in a dresser.