Clear Out/Unplugged Chips gives Digby's old lava lamp to Grizel, not realising that it has sentimental value to Digby. When Grizel refuses to give the lamp back Digby takes extreme measures. Digby and Chips have fun playing with a mysterious new toy they find at the end of a chain - until it breaks. That's when they discover that it's actually the plug for the lake - and Grumpy is in danger of being sucked into the whirlpool as the water drains away!