Oh dear Morc and Skelly are at it again and somehow Garth and Bev have gotten mixed up in the mess!
Skelly has challenged Morc to a boat race, but when everyone gets out to sea the oars are lost overboard and they can’t get back to shore!
Luckily Garth and Bev see a jellyfish propelling himself through the water and get the great idea to propel the boats back to shore. Grandfather Lir is so proud of his grandchildren he sends them through the time spiral to meet Frank Whittle who invented Jet propulsion. The invention that makes planes go really fast through the air!