Bob Fossil sets up an underground boxing match between Killeroo and Howard. Howard enlists the help of his fighter uncle, but Vince thinks his dream can lead Howard to victory.

Amid animals going missing at the Zooniverse, Howard and Vince decide to investigate after Mrs Gideon's python disappears. They soon discover a terrifying plan led by Bainbridge.

While dressed as a gorilla, Howard is mistaken for a real one by the Grim Reaper and is taken to monkey hell.

In a spirit of daring adventure, Howard and Vince head to the Arctic tundra in search of the Egg of Mantumbi. There, they come face-to-face with the hideous demon Black Frost, but luckily Vince has befriended a polar bear.

With Dixon Bainbridge set to sell the Zooniverse to the highest bidder, Howard and Vince explore the depths of the Jungle Room in search of the man they think can help save the zoo: Tommy Nookah.

Howard tries to start up a career as a serious writer in order to impress Mrs Gideon, but comes up against some stiff competition from Vince's book.