Young Johnny is gung-ho and full of courage. Johnny's brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream it up, Johnny will do it; as long as his genetically engineered super dog, Dukey, can come along.
The best episode of "Johnny Test" season 5 is "Johnny Goes Nuts", rated 6.3/10 from 35 user votes. It was directed by Larry Jacobs and written by Keith Wagner. "Johnny Goes Nuts" aired on 6/13/2011 and is rated 1.3 point(s) higher than the second highest rated, "Johnny Daddy Day".
Johnny is finally old enough to participate in Porkbelly’s Annual Running of the Squirrels, but he has to get past Lila, who thinks it’s too dangerous, despite performing many dangerous attempts on her son to stop him.
Director: Larry Jacobs
Writer: Keith Wagner
Johnny, the twins and Lila realize it’s Father’s Day, and they don’t have a gift. They try many disastrous attempts, making Hugh wish they had never remembered!
Director: Larry Jacobs
Writer: Scott Fellows
Johnny wins an ocean cruise for him and his family, but it turns to be just a trap by Bling-Bling Boy, who deliberately crashes the ship so he can romantically save Susan.
Director: Larry Jacobs
Writer: Mark Fellows
Johnny tries various schemes to buy an M-rated video game, not knowing what the consequences will be.
Director: Larry Jacobs
Writer: Scott Fellows
After Johnny and Dukey track mud in the house, they use a special stain-remover designed by Susan and Mary, but also learn it can make Johnny invisible.
Director: Larry Jacobs
Writer: Brad Birch
Tired of all of the Johnny vs. Bling Bling battles with no winner, the Test sisters and Bling-Bling's science team make a bet to see who is the final winner of the battles.
Director: Larry Jacobs
Writer: Scott Fellows
Johnny and Dukey bring characters in a science-fiction movie to life with Susan and Mary's 3-D glasses, and now the aliens in the movie want to conquer the Earth.
Director: Larry Jacobs
Writer: Keith Wagner
Mary turns Johnny and Dukey into sharks when Bling Bling Boy hypnotizes Susan into falling in love with him.
Director: Larry Jacobs
Writer: Rick Groel
A time-traveling mishap sends Johnny and Dukey back to the 1950s.
Director: Larry Jacobs
Writer: Brad Birch
Johnny wants to increase his charisma when he becomes jealous of Gil's popularity.
Director: Larry Jacobs
Writer: Mark Fellows
Johnny uses his sisters' genetically altered rat for a school project, only to have it stolen by a desperate circus owner to save his failing show.
Director: Larry Jacobs
Writer: Bobby Gaylor
Johnny and Dukey help Mr. Black and Mr. White catch a runaway robot dog before it explodes.
Director: Larry Jacobs
Writer: Lazar Saric
Johnny, his friends, and his enemies compete with each other in a lawn mower race.
Director: Larry Jacobs
Writer: Martin Olson
Johnny "borrows" his sisters' worker drones to build the ultimate treehouse to impress Sissy, but ultimately ends up failing.
Director: Larry Jacobs
Writer: Mike Yank
When Johnny is ordered by his school to go camping with his father, he uses his sisters' ray gun to turn Dukey into a monster to scare his father out of it, only to have Bigfoot fall in love with monster Dukey.
Director: Larry Jacobs
Writer: Bobby Gaylor
Johnny competes with his family, his friends, and his enemies in a prank war. Error: When Johnny said to Dukey an escape plan, Dukey said look it's Gill.When Mr. Mittens [ aka.Super kitty prakster S.P.K. for short.] said I can't beleve you fell for it meanen it was a prank.
Director: Larry Jacobs
Writer: Scott Fellows
Aliens from a meat-themed planet ask Johnny to protect their home world from Dark Vegan who wants to destroy it out of frustration because of his failure to make the perfect toast.
Director: Larry Jacobs
Writer: Keith Wagner
The Super Smarty Pants possesses an Eskimo to get to Johnny, where it kicks him away and possesses Johnny, making him the smartest kid in school. Not wanting to be outsmarted, his sisters go to great lengths to de-pants him.
Director: Larry Jacobs
Writer: Joshua Hamilton
Johnny accidentally turns his sisters into vampires, and has to save Gil from getting bitten by his lovestruck vampire sisters and change them back.
Director: Larry Jacobs
Writer: Mark Drop
Johnny eats all of the peach yogurt, not knowing that each container is filled with growth serum, and becomes a Hulk monster, causing destruction.
Director: Larry Jacobs
Writer: Scott Fellows
Susan and Mary make a key for Johnny that can open any lock in Porkbelly, but people try to steal it for their own benefits.
Director: Larry Jacobs
Writer: Rick Groel
When Johnny's mom makes him wear a big winter coat, he is teased at school. However, Mr. Black, Mr. White, and the General ask Susan and Mary to make some sort of weapon to destroy aliens if they ever attacked, so they make Johnny's jacket the weapon.
Director: Larry Jacobs
Writer: Scott Fellows
Tired of Johnny's constant lying, Susan and Mary attach a second mouth to him that does nothing but tell the truth.
Director: Larry Jacobs
Writer: John Derevlany
Susan swaps bodies with Johnny so that she and Mary can get a men-only science award.
Director: Larry Jacobs
Writer: Rick Groel
Johnny spends the night in a haunted house with Dukey and Jillian to win a ton of candy.
Director: Larry Jacobs
Writer: Bobby Gaylor