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The CyberSquad finds that no one is on floor -3, and Motherboard cannot track their location. Jackie guesses that they are on floor -5, the Grand Ballroom, so Digit tries to determine which direction to go. Initially, he thinks that they should go up, but that turns out to be incorrect. Jackie, Inez, and Matt explain to Digit why -5 is less than -3.

What is the "best" number? There's only one according to Sheldon! In this clip, Sheldon explains what the best number is and why it is the best number.

The team listens in to communications coming from outer space and notices a pattern: each signal represents a prime number. They determine that the signal is coming from the star, Vega. After recording the sequence, the team displays on the computer screen that every prime number between 2 and 101 has been sent to them.

The captain tells the squadron that he is expanding it to four members, which concerns all of the lieutenants. Lt. Purcell states that four is an unlucky number because it's not prime. He then defines a prime number.

Shari burned an important batch of magic crumpets and needs to make a new batch of 8. However, her recipe will only make 4 crumpets. Matt helps her determine the quantity of each ingredient she needs to use in order to make 8 batches.

The CyberSquad helps Shari make a new batch of Cosmic crumpets. Since they're out of dragon drool, they venture out to collect some. In order to make fewer trips to the dragon, they convert the needed six 1/4 cups into 1 cup and two 1/4 cups so that they only need to make three trips. While the crumpets are baking, Shari presents the CyberSquad with two different ways of writing out fractions.

The CyberSquad is having trouble keeping track of Buzz and Delete's moves, so Inez suggests they determine the floor that Buzz and Delete are on and go directly there instead of following each individual move. She draws a number line to make it easier to find out where the two villains are. The villains' most recent moves confuse the group, as they end up below the ground floor. Matt, Inez, and Jackie realize that they need to travel to negative floor numbers and define negative numbers for the confused Digit.

The Cybersquad members divide up pieces of rock candy so that each gargoyle gets the same number of candies. They don't have time to use the rounds method, as the gargoyles are breaking down the door, so they calculate the correct number by determining how many times the number of gargoyles (7) goes into the total number of candies (35).