On this episode I have spotted two mistakes:

(one) When Soo is about to have a bath she is saying to Sooty that she is worried that they don't have the scrubbing brush(as Sooty has just blown it up), when there just in front of her is another scrubbing brush!

(two) When they are in the garage and Tommy is putting Sooty's invention in the water look carefully and you can see the shoulder of the person puppeting Sooty!