Thinking that Gus has caught the fatal and fictional disease "Monkey-Itis", Wally tries to make his brother's last days as comfortable as possible, no matter how much he hurts him in the process.
In order to hide Deep Space Dave from a fire-breathing beast, Wally turns the rocket ship into a disco club.
A short-tempered robot named Belindor steals Yay-Ok's "robo-mojo" as revenge for ignoring her in high school.
In an attempt to out-do the Space Gorilla's best-selling fragrance, Gus and Wally create Monké, a horrifying smell of their own.
Monkevil refuses to marry a giant insect beast, but the groom will not take no for an answer, so Wally disguises himself as the girl monkey and takes her place.
Gus and Wally win a trip to "Banana Fun Land", which turns out to be a ruse by Lord Peel in order to trap them on a deserted planet. However, when Banana-Man (Lord Peel) gets stuck in there as well, he starts bounding with the monkeys.
Nefarious, disguised as Inky, manages to get inside the rocket ship, but ends up in the middle of a competition of affection between Gus and Wally.
The monkeys find their long-lost father frozen in a block of ice and are thrilled to spend some quality time with him, but first they must teach the middle-aged monkey to overcome his old-school mannerisms.
Thanks to the monkeys, Chimpsky loses his job and is demoted to a Jr. Jr. Jr. Rocket Monkey 3rd Class. Gus and Wally take advantage of their 2nd class status and make the former GASI chief do their bidding.
Lord Peel has a new plan: get the monkeys to hate bananas. While he does succeed at first, things take a horrible turn when Gus and Wally are determined to eradicate every single banana in the galaxy.
Gus and Wally find out that their old college roommate Cornelius J. Simian is now a scientist and take him for a day of partying to revive the good ol' days. However, without Simian's surveillance, his galaxy-destroying weapon "Blackhole-Inator" is activated.
It's "Robot Appreciation Day", so Wally and Gus give Yay-Ok a baby-robot for him to take care of. However, the little bot takes more of a liking to the monkeys than his own father.
The monkeys go to dangerous lengths to prove who can out-share the other.
Gus and Wally are supposed to be taking care of their grandmother.
When Wally discovers that he is able to coax music from a rock, a jealous Gus tries to prove that said rock is alive and making the music on its own.
When Gamester X discovers that Yay-Ok was the star of the superhero show Thunderbot, he captures the robot in order to make a series finale, as the original show ended on a cliffhanger.
After admitting he is a banana, Lord Peel organizes a commemorative "Banana Day Parade" in order to lure Gus and Wally off a cliff. However, he also falls off and lands nearby a family of banana hillbillies, whose daughter wants to marry Peel.
A doodah gives Gus and Wally one of his wish feathers as a reward for saving his life. But the duo want more feathers, so they put the bird-like alien through several dangers in order to save him again and again.
Wally refuses to share his birthday party with Nefarious, who has been invited aboard the rocket ship for the day.
When Yay-Ok starts to feel old, he gives himself a hip new upgrade. However, a misunderstanding causes Gus and Wally to believe that this new robot has killed their old pal, so they put him on trial.
Lord Peel finds a way to ruin Halloween.
Gus turns Yay-Ok into a werebot in order to prove that they exist.
Someone on the ship has been tattling to Dr. Chimpsky. After some investigations, Gus, Wally and Yay-Ok soon find the culprit: the house plant.
The monkeys are excited to see the premiere of the new Deep Space Dave movie, but their plans are thwarted when Chimpsky gives them an incredibly boring mission: repeatedly push a button to avoid freeing a giant monster.
Yay-Ok encounters Belindor again, who hypnotises him into staying with her and doing whatever she wants. The monkeys try to stop her in order to save their robot pal and see the new wrestling event: Bananarchy.
After a misundertanding causes Gus and Wally to cut down the Boom-Boom Tree, home of the nearly extinct Boom-Boom, they are forced to take care of the homeless annoying creature while a new tree is grown in "about a hundred years."