A beam of light from a stained-glass window has to be zig-zagged across the room by rotating a set of mirrors into position. Once the beam is directed to the target on the wall, it ignites a rope which burns through and releases the crystal.
|2018-06-22S4E3: Celebrities 3|| Bridge|
|2018-07-06S4E5: The Derry Girls|| O'Donnell|
|2018-07-20S5E1: The Gamers|| Gauld|