After Ms. Baker takes a personal day, she is replaced by a substitute that has a hard time handling the classroom. Soon, the school day devolves into chaos and it is up to Clarence to get Mrs. Baker back to where she belongs, the classroom.

On a school trip to the Aberdale Natural History Museum, Clarence and Sumo check out the displays, goof around with the exhibits and even remove a tooth from the T-Rex display.

As Sumo’s dad Mel prepares the family for over-the-top doomsday scenarios, Sumo struggles to convince his family to let him keep a new pet.

An ever-cheerful Clarence attempts to improvise a sleepover party with some of Aberdale’s townsfolk in an unusual location – while everyone else panics.