Johnny Test is a Canadian/American animated television series. It premiered on Kids' WB, on The WB Television Network, on September 17, 2005. The series currently airs in the United States on Cartoon Network, as of January 7, 2008, and in Canada on Teletoon, as of October 28, 2006. The show was produced by Cookie Jar Entertainment for its second and later seasons. The series is rated TV-Y7 for the first four seasons, and TV-Y7-FV for the fifth. Johnny Test started its fourth season on September 10, 2009, containing 26 full episodes. It was the first season to premiere on Teletoon first. This is the first season to be produced in high definition. This season began airing on Cartoon Network on November 9, 2009. This would be the final season for Louis Chirillo and Ashleigh Ball as the voices of Dukey, Mary Test, and Sissy Blakely, although Ball returns later to resume her roles in Season 6. This season, along with the third season, was released on DVD in a bundle on September 13, 2011 in Region 1.

Season 4 Episode 14 - Johnny's Big Dumb Sisters

The twins' latest invention accidentally makes them dumb thanks to Johnny right before their scholarship interview. Air Date : 26th-Nov-2009

Season 4 Episode 1 - Johnny's New Baby Sisters

Susan and Mary purposely turn themselves into babies while the parents are out, and Johnny has to keep them safe from the irresponsible babysitter Gil; this interferes with a party he and Dukey had been planning. Air Date : 9th-Nov-2009  Read More

Season 4 Episode 2 - Porta Johnny

Johnny tricks his sisters into letting him have teleporting powers. Susan and Mary mess with the powers to get revenge. Later the twins accidentally get them caught in a middle of an art robbery. Air Date : 10th-Nov-2009  Read More

Season 4 Episode 3 - Join the Johnny Scouts

After Johnny lands his bike into a garbage truck, he becomes a Lady Bird Scout and tries to sell 1,000 boxes of cookies to get a new one. Little does he know, Sissy wants the bike as well, but for a better reason. Air Date : 11th-Nov-2009  Read More

Season 4 Episode 4 - Johnny BC

Johnny goes back in time in order to get a sloth bone for the twins, but when he returns he becomes a caveman, interfering with his grounding from selling Hugh's personal items. Air Date : 12th-Nov-2009  Read More

Season 4 Episode 5 - Runaway Johnny

Johnny and Dukey run away when Johnny's parents say he's old enough to do chores but not old enough to watch PG-13 movies. Air Date : 12th-Nov-2009  Read More

Season 4 Episode 6 - Johnny on the Spot

Johnny steals a portable black hole, which later creates an early apocalypse. Air Date : 12th-Nov-2009  Read More

Season 4 Episode 7 - Dark Johnny

Johnny joins forces with Dark Vegan to get him back to his home planet. Air Date : 1st-Oct-2009  Read More

Season 4 Episode 8 - No Homework for Johnny

Susan and Mary build Johnny a robot in order to help him do his homework, but the robot ends up stealing things for Johnny. Air Date : 1st-Oct-2009  Read More

Season 4 Episode 9 - Papa Johnny

Susan and Mary switch Johnny and Hugh's brains after the two make a bet that involves taking on each other's lives. Air Date : 8th-Oct-2009  Read More

Season 4 Episode 10 - The Johnnyminster Dog Show

Johnny and Dukey try to get in a dog show which only allows perfectly groomed and trained dogs. Air Date : 8th-Oct-2009  Read More

Season 4 Episode 11 - Dukey Jekyll and Johnny Hyde

Dukey drinks a liquid which makes him turn into a monster. To make matters worse, a dog catcher (and later Mr. Black and Mr. White) are after him. Air Date : 15th-Oct-2009  Read More

Season 4 Episode 12 - Johnny's Trophy Case

Johnny wants to get a trophy to put in his trophy case. Susan and Mary get obsessed with winning, so the three of them enter The Pork Belly River Jumpoff to win 1 million dollars and a trophy. Air Date : 15th-Oct-2009  Read More

Season 4 Episode 13 - Johnny's Amazing Cookie Company

Susan and Mary make fortune cookies that come true, and Johnny sells them with the typical drastic results. Air Date : 26th-Nov-2009  Read More

Season 4 Episode 14 - Johnny's Big Dumb Sisters

The twins' latest invention accidentally makes them dumb thanks to Johnny right before their scholarship interview. Air Date : 26th-Nov-2009  Read More

Season 4 Episode 15 - My Johnny Guard

Johnny gets hired to stop Bling-bling from kissing Susan, but Johnny turns on the sisters once Bling-Bling bribes him. Air Date : 3rd-Dec-2009  Read More

Season 4 Episode 16 - Tom and Johnny

Johnny turns into a mouse for Susan and Mary, but when Mr. Mittens comes, things get chaotic. This episode is a parody of Tom and Jerry. Air Date : 3rd-Dec-2009  Read More

Season 4 Episode 17 - The Quantum of Johnny

Johnny tries to get invited to a party to stop a villain. NOTE: Susan and Mary don't appear in this episode. Air Date : 10th-Dec-2009  Read More

Season 4 Episode 18 - Johnny Get Yer Gum

Mr. Whacko invents a new helium gum that lifts kids into the sky, and Johnny must save them. Air Date : 10th-Dec-2009  Read More

Season 4 Episode 19 - Old School Johnny

Johnny travels to 1845 when school was easier, but he gets stuck there because the power supplier to the Turbo Time Tea house hasn't been invented yet. The sisters and Johnny try to find outdated technology to power the tea house. Air Date : 7th-Jan-2010  Read More

Season 4 Episode 20 - Johnny Degrees Below Zero

Johnny creates a magnetic force field on the Earth which makes Porkbelly the new north pole. Air Date : 7th-Jan-2010  Read More

Season 4 Episode 21 - Johnny Johnny

Johnny and Dukey get framed for stuff that Johnny and Dukey look alike robots (which Mr. Black and Mr. White made) do around Porkbelly. Air Date : 4th-Feb-2010  Read More

Season 4 Episode 22 - Johnny Double Coupons

Johnny keeps attempting to ride down Suicide hill, but Susan and Mary keep redeeming Johnny's coupons. Air Date : 4th-Feb-2010  Read More

Season 4 Episode 23 - X-Ray Johnny

Johnny gets X-Ray goggles. Air Date : 25th-Feb-2010  Read More

Season 4 Episode 24 - The Destruction of Johnny X

Johnny and Dukey decide to remain in super hero mode permanently but find being a superhero is harder than they think. Air Date : 25th-Feb-2010  Read More

Season 4 Episode 25 - iJohnny

The twins upgrade Johnny's new cell phone. Later the phone becomes too intelligent and begins hacking government space missiles. Air Date : 2nd-Mar-2010  Read More

Season 4 Episode 26 - Johnny vs. The Mummy

Johnny goes on a trip to the museum and brings the things to life, including a mummy. Air Date : 2nd-Mar-2010  Read More

Season 4 Episode 27 - Johnny Grow Your Own Monster

Johnny's mail order foam monster becomes a real monster once the twins swap the water with their bottle of "side effects". Air Date : 11th-May-2010  Read More

Season 4 Episode 28 - Who's Johnny

When Sissy considers Johnny too gross to help her in a science project, he begs Susan and Mary to change his personality. Air Date : 10th-May-2010  Read More

Season 4 Episode 29 - Princess Johnny

Johnny poses as a princess in order to prevent a war. Meanwhile, Susan and Mary decide that they would like to act like normal girls. Air Date : 24th-May-2010  Read More

Season 4 Episode 30 - 99 Deeds of Johnny Test

After getting his 99th detention, Johnny learns he must perform 99 good deeds or he will be sent to military school. Air Date : 24th-May-2010  Read More

Season 4 Episode 31 - Johnny's Amazing Race

Johnny and Dukey challenge his sisters, their friends, and their enemies to a survival challenge in which the winning team gets hundreds of dollars in gift certificates. Air Date : 12th-Jul-2010  Read More