Rupert Reekie, a glass artist, has moved to Sunflower Valley with his cat Sprat. Bob and the team are building him an amazing studio. Meanwhile Roley is mystified as to why Pilchard isn't being as friendly as she normally is. Every time he approaches, she runs away. Clumsy Roley ties to be more 'catlike' but accidentally crushes some glass. Roley is distraught, thinking that it's some of Rupert's art. Meanwhile, Sprat is causing chaos, causing Rupert to drop an important stained glass window. Roley is delighted to discover that the glass he crushed was old glass for recycling and that it's just right for Rupert to make a replacement window. Roley is particularly thrilled to discover Pilchard with a litter of kittens! That's why she was being strange - she was about to become a mummy. And the dad is Sprat. Uncle Roley is very proud!