Brain Freeze broadcasts live from the seaside and asks the question 'Why is the sea salty?' All is going well until McCork introduces his new sidekick Rocky the seagull and suddenly it gets a whole lot harder for floor manager Colin to keep the show on the road.

Dr Knowles and Professor McCork attempt to ask the almost impossible question 'How many plants are there in the world?' Backstage, McCork unveils his mysterious Megaphone of Truth, an odd contraption which makes it impossible to lie. When it comes to Colin's turn, he has an awful lot to get off his chest.

McCork and Hucklebuck attempt to break the record for the world's biggest ice cream cone in the Brain Freeze studio and Dr Knowles answers the question 'Can ice cubes sink in water?' What can possibly go wrong?