The BEST episodes of Johnny Test season 4

Every episode of Johnny Test season 4, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Johnny Test season 4!

Crafty 11-year-old Johnny Test and his genetically modified talking dog go on high-octane adventures to save his family (and the world) from disaster.

Last Updated: 2/6/2024Network: Cartoon NetworkStatus: Ended

8.11

9 votes

#1 - Runaway Johnny

Season 4 - Episode 5 - Aired 9/24/2009

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.

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7.11

9 votes

#2 - The Quantum of Johnny

Season 4 - Episode 17 - Aired 12/10/2009

Johnny tries to get invited to a party to stop a villain. NOTE: Susan and Mary don't appear in this episode.Johnny.

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6.73

11 votes

#3 - Porta Johnny

Season 4 - Episode 2 - Aired 9/10/2009

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.

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6.70

10 votes

#4 - No Homework for Johnny

Season 4 - Episode 8 - Aired 10/1/2009

Susan and Mary build Johnny a robot in order to help him do his homework, but the robot ends up stealing things for Johnny.

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6.70

10 votes

#5 - Papa Johnny

Season 4 - Episode 9 - Aired 10/8/2009

Susan and Mary switch Johnny and Hugh's brains after the two make a bet that involves taking on each other's lives.

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6.64

11 votes

#6 - The Johnnyminster Dog Show

Season 4 - Episode 10 - Aired 10/8/2009

Johnny and Dukey try to get in a dog show which only allows perfectly groomed and trained dogs.

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6.60

10 votes

#7 - Johnny Get Yer Gum

Season 4 - Episode 18 - Aired 12/10/2009

Mr. Whacko invents a new helium gum that lifts kids into the sky, and Johnny must save them.

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6.59

17 votes

#8 - Johnny's New Baby Sisters

Season 4 - Episode 1 - Aired 9/10/2009

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.

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6.57

7 votes

#9 - Dukey Jekyll and Johnny Hyde

Season 4 - Episode 11 - Aired 10/15/2009

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.

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6.38

13 votes

#10 - Join the Johnny Scouts

Season 4 - Episode 3 - Aired 9/17/2009

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.

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6.30

10 votes

#11 - Johnny's Amazing Cookie Company

Season 4 - Episode 13 - Aired 11/26/2009

Susan and Mary make fortune cookies that come true, and Johnny sells them with the typical drastic results.

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6.30

10 votes

#12 - My Johnny Guard

Season 4 - Episode 15 - Aired 12/3/2009

Johnny gets hired to stop Bling-bling from kissing Susan, but Johnny turns on the sisters once Bling-Bling bribes him.

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6.22

9 votes

#13 - Old School Johnny

Season 4 - Episode 19 - Aired 1/7/2010

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.

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6.20

10 votes

#14 - Dark Johnny

Season 4 - Episode 7 - Aired 10/1/2009

Johnny joins forces with Dark Vegan to get him back to his home planet.

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6.11

9 votes

#15 - Johnny on the Spot

Season 4 - Episode 6 - Aired 9/24/2009

Johnny steals a portable black hole, which later creates an early apocalypse.

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6.00

8 votes

#16 - Johnny's Trophy Case

Season 4 - Episode 12 - Aired 10/15/2009

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.

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6.00

9 votes

#17 - Tom and Johnny

Season 4 - Episode 16 - Aired 12/3/2009

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.

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5.89

9 votes

#18 - Johnny BC

Season 4 - Episode 4 - Aired 9/17/2009

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.

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