Who Cut Up the Rockhopper’s Collection?

Rockhopper Penguin is a great fashion designer, but his latest creations have just been cut to pieces by someone. Who is the guilty party? Probably one of the three models whom he refused for his collection. In the meantime, Sherlock has a problem with a hole in his pants. Hermione reassures him: she'll take care of it. But is she as good a seamstress as she pretends to be?