Hook And Loop - S1.E7

Garth and Bev are collecting seeds for Grandfather Lir after Niall the Sheep naughtily ate all the ones in his garden. But Niall turns out to be a great help because they find that certain seeds stick to his wool and they can collect loads! Through the Time Spiral they discover that's a lot like how George de Mestral got the idea for his sticky clothing fastener.