S1, E6: It's Sir Wrench-a-Lot's birthday! The Builders are celebrating with cake and singing when Sir Wrench-a-Lot releases a hiccafurp (hiccup + burp)! The stench is so bad that his only option is to lock himself away until he's better, but King Hex can't be without his bravest knight! King Hex sends the Builders on a quest to find a magical dehiccafurp potion for Sir Wrench-a-Lot!