Thomas & Friends - Season 25

When Sandy learns about a massive shipment of sand that needs to be delivered, she is determined to help. But her size means she can't help Thomas tow the sand, so she finds other ways to help him. Along the way, Sandy accidentally gets Thomas' sand shipment wet, turning it to mud, and making it impossible to get over a mountain without spilling anything. However, Sandy is still determined to help Thomas complete his sandy delivery.