Brain vs. Brawn: The Ultimate Showdown

'''After a long and painful season of grueling challenges, only two contestants remain in the competition, and their mission is to battle it out for the million-dollar prize! They are taken to a Colosseum to fight in the ultimate final challenge, which features numerous obstacles and the return of a fB|ew old faces. One contestant wins the support of the entire the crowd, with one exception. In the end, one contestant wins the challenge and the money, and someone gets his long-awaited karma.'''

Plot
The episode begins after the events of The Enchanted Franken-Forest, and Cameron is disheartened that Zoey didn't make it to the finale. However, Lightning is happy, because it will be much easier to win the million dollars due to Cameron's lack of athleticism. Cameron tells him that even though he isn't that strong, he still has as they call it "game." Lightning shows his "game" by lifting a log over his head and saying how he's got it in the bag. Cameron points out though that he could not win if the last challenge is an intellectual one, but Lightning points out that past Total Drama finales have always been physical and states that he can crush Cameron like a grape.

In the confessional, Cameron is shown not to be worried, but terrified. However, he mentions that he has come a long way and how he can do anything if he can beat Lightning. After he says that, Lightning scares him saying the same grape threat. Cameron says on the other hand if Lightning wins, he will still have a bubble to stay in for the next sixteen years growing his skin back while eating his mom's sandwiches through a straw. Lightning screams the word grape making Cameron even more terrified. He says to his mom if she's watching this to start pumping out the oxygen.

Lightning is then in the confessional saying while doing curl-ups at the same time, if he was a gentleman he would let Cameron win, (referring to him as a "little girl"). But he states that his father didn't raise a gentleman and that the victory will be his before getting scared and falling down due to the horns playing in the background.

Later that day, Chris is seen being pulled in a carriage with a television; it shows the two finalist's parents, being able to video chat with them. Cameron's mom is first seen talking to him. She had told him since purified air costs so much, she won't be able to afford his bubble. Cameron seems shocked while his mother needs him to win the million. Next is Lightning's father, but only seen from his backside. He is also saying that his son is going to win the million while he's being interviewed. He even bet his championship rings. Lightning seems nervous with the heavy toll he holds now, while his father says he's nothing without them. The video then shuts off, while Lightning never got to actually speak to him.

The final two and Chris are seen in the carriage as they approach the "Chrisiseum". Once inside, Chris then shows the eliminated contestants. Cameron then asks what happened to Scott, who is now in a machine. Chris says that his machine helps him say "yes" and "no", since he can't talk. Sam then asks if he has to cheer, while Chris says it's mandatory to cheer, or else Fang will be released on them. Chris then announces the final challenge, a gladiator battle royal. The first part is to create armor out of a massive junk pile dumped next to them. Chris then says they have fifteen minutes to assemble their armor, but to also be careful for booby traps. Lightning first starts out pushing Cameron as he goes back and forth in front of the Peanut Gallery, who are cheering and helping him build. Cameron then finds a computer and a HazMat suit. When he pulled on the suit, a bomb goes off in front of him. Lightning then makes fun of him and continues working. But Cameron then spots a blowtorch that is next to Lightning, which he could use. Later on, Lightning has his suit armor almost complete, while

Cameron uses a computer, powered by the Marshmallow of Toxic Loserdom, to program his armor. A quick montage is then seen between the two preparing, until the fifteen minutes were up. Lightning is seen with his armor which everyone cheers him on, while he makes fun of Cameron, who only has a suitcase. Cameron then kicks the case, releasing a which self assembles onto him. Lightning is stunned by his suit of high-tech, power armor. Chris then announces part two, where the rules are, whoever pins the other for three seconds first win. The battle then starts with Lightning going after Cameron. Cameron then blasts him, causing him to fall down. Chris then brings in the mutant beetle that shoots fire at Lightning, while he runs towards Cameron and punches him. He then falls down, powering his rockets on the bottom of his feet, blasting the beetle out of the ring.

Lightning then attacks Cameron multiple times with his weapon, which causes Cameron's suit to lower in armor strength. Chris gets bored of the battle and brings out a mutant alligator. Cameron blasts out of the alligators mouth, while he picks up Lightning who punches him from below. Cameron then punches the alligator in the stomach, sending them both flying. Lightning is able to land on the ground in a split formation, injuring his groin in the process. Mike then tells Cameron to pin him, but Lightning gets back up, keeping the fight going on. Cameron fire his blaster arm at Lightning, but he manage to deflect one of the shots out of his way with his club. One of the shots ended up in Chris's chair hitting his remote. The remote then malfunctions, causing all the mutant creatures on the island (and Ezekiel) to appear. Zoey, Mike, and Scott are seen traumatized in the confessional after seeing all the animals again. The animals then attack the eliminated contestants, causing them to go into the ring with Lightning and Cameron. Anne Maria is seen confronting a mutant squirrel, and the squirrel shoots her hair. Ezekiel then comes to save her and leans in for a kiss as she screams.

Cameron then gets worried about his endangered friends, while Lightning attacks him from behind and almost pins him. Cameron then throws him off causing his helmet to also fall off. Cameron then uses the helmet to save Anne Maria, knocking out Ezekiel. Anne Maria then hairsprays her hair to fix the damage done to it.Dakota is seen attacking a mutant turtle holding Sam, while Dawn says her tea leaves didn't predict B getting punched by the octopus in the tree. Staci is also seen getting eaten by Larry, talking about her ancestors as usual. Cameron then blasts Larry in the privates, as he runs away. Lightning finally comes back to hit Cameron once more, getting rid of all of Cameron's armor strength all together. Cameron then orders the armor to transfer all power to create a magnetic field, which finally shuts down Cameron's armor. Everyone is then stunned when it appears nothing has happened Lightning then tries to attack Cameron one last time, but everything starts to get attracted to Lightning's armor. Cameron then tells him he turned him into a magnet, causing everything magnetic in the field to be pulled towards him. A storm cloud nearby strikes Lightning, causing everything to get blasted away from him and turns his hair white. However, Cameron also couldn't move as he uses the last of his armor's energy for the last attack. Depending on the ending, one contestant fall over the other and wins the challenge.

After collecting his reward, the winner leaves with the other contestants on a boat driven by Chef. Chris then starts to sign off, but before he does, he reveals that he placed a bomb at the bottom of the boat. When he pressed the detonator however, the dock explodes underneath him explodes instead. Chris realizes that Chef has switch the bomb's position and yells at him. Chris then resumes his sign off, when suddenly a flock of helicopters surround the island, saying that the island is now under government protection. Chris is also ordered to be quarantined, while the cast is seen laughing as they drive away.

Cameron's ending
Lightning falls first, followed by Cameron who landed on top of Lightning. The contestants count to three as Cameron wins. Chris then announces Cameron has won the fourth season. A few hours later, the cast is seen at the Dock of Shame on a boat while Cameron is also seen with his million dollars as he approaches the boat with everyone else. Cameron then realizes he no longer needs the money for his bubble. He then decides that because they all helped him no longer need his bubble, that he'd share the money with them. Sam is seen talking about buying video games, Jo talking about starting a gym, and Brick shouts out that he gets to go to fashion school. Everyone looks at him awkwardly as the boat pulls away.

Lightning's ending
Lightning falls on top of Cameron in a daze. Chris counts to three, and then declares Lightning the winner, much to everyone's chagrin. In the confessional, Lightning boasts about his win, saying "not even lightning can stop the Lightning!" He receives the million dollars on the Dock of Shame while Zoey comforts Cameron over his loss, which Cameron says was more of a victory due to him still being alive. When Mike asks what Lightning will spend the money on, Jo asks for 10% due to her getting him to the finals in the first place. Sam offers to play any video games that Lightning needs to beat, but Lightning rejects both of them and says that he's spending it on his own stadium so that he can get in shape for football season. Chris pulls out an X-ray of Lightning's body following the challenge and advises him to avoid physical workouts for a while, but Lightning says that pain doesn't matter to him. He then takes a step forward and breaks his leg as the boat pulls away. The screen then switches to the confessional with Jo in it. She states how she carried these "morons" to the finale and thinks she should have won the money, as she then says that she got ripped off.

Cast

 * B, Chef Hatchet, Ezekiel, and Scott appear, but they do not speak. However, Chef screams at the beginning of the episode.
 * Lightning's father appears and has lines, but it is unknown who voiced him.
 * A member of the RCMP speaks; however, it is unknown who voices him.

General

 * This is the second season in a row where the United States and Canada have two different winners.
 * In this case, Cameron winning in Canada and Lightning winning in the United States. This first happened in Total Drama World Tour, where Heather won in the United States and Alejandro won in Canada.
 * This is the first, and currently only, final two in Total Drama history to have two male finalists.
 * This is currently the only finale in which the challenge is not a race, but a duel.
 * This is the first time that Latin America and United States have different endings.
 * In the United States version, Scott is not shown crying when everyone is laughing at him. Instead, the camera cuts to Chris smiling with the accompanying twinkle in it.
 * This is the first time Cartoon Network has paired two episodes together. In this case, it was with The Enchanted Franken-Forest. It would happen again later on with So, Uh This Is My Team? and I Love You, Grease Pig!; This Is The Pits! and Three Zones and A Baby; and Pahk'd With Talent and Lies, Cries and One Big Prize.
 * This is the only episode in which Mike appears, but none of his alternate personalities do.

Continuity

 * This is one of only eight episodes in the series (as well as the only one in Total Drama: Revenge of the Island) to pick up right where the previous episode ended. The others are Not So Happy Campers - Part 2, Phobia Factor, The Aftermath: IV, Walk Like An Egyptian - Part 2, Planes, Trains, and Hot Air Mobiles, Hawaiian Punch and Scarlett Fever.
 * This is the third episode of the season in which Ezekiel has an individual cameo appearance, and his fourth cameo appearance overall of the season.
 * This marks the second time in the series that the winner actually gets away with their prize money. The first is Duncan or Beth, who got away with their prize money in Total Drama Action (although Beth later used it to bail herself and Lindsay out of prison in one of the versions). This happens again in Total Drama: Pahkitew Island, where Shawn or Sky get to keep the money in their respective endings.
 * With Cameron's victory in this episode, all four of the Total Drama season winners are males in Canada. This streak would continue in the first half of the next season, with Mike's victory and then finally break in the second half thereafter, with a female finally winning.
 * In the United States, however, only four males have won Total Drama including Mike's ending, since Heather won Total Drama World Tour.
 * This is the second time that a contestant is shown to need a robotic suit after being injured. The first is Alejandro at the end of Hawaiian Punch.
 * Coincidentally, both were the antagonists of their respective seasons when they were placed in robotic suits.
 * When the "Chrisiseum" is first revealed, the tail wing of the Total Drama Jumbo Jet from the previous season can be seen bearing the main portrait of Chris's face.
 * When the intern hits wrong button on the music player, Sea Shanty Mix from Newf Kids on the Rock is heard.
 * The arrest of Chris and the transformation of Camp Wawanakwa into a reserve follows up on two previous plot points:
 * Dawn's threat to rat out and save the animals on the island from her departure speech in Backstabbers Ahoy!.
 * The Canadian Government's pursuit of Chris for his illegal dumping as seen in A Mine Is a Terrible Thing to Waste.
 * The formula Cameron writes on the ground while building his suit is the same formula Izzy wrote in Jamaica Me Sweat.
 * The costume Chris wears during the challenge is the same one he wore in Million Dollar Babies.
 * The tune the interns blow on their bugles is also heard in 2008: A Space Owen before the contestants are introduced to the Vomit Comet.
 * Similarly to it, It's also cut off around the same time.

Goofs

 * When Chris introduces the eliminated Mutant Maggots, Jo and Brick are sitting with them when they were switched and put on the Rats.
 * Dakota and Scott were with the Rats even though they were later put on the Maggots.
 * However, Chris could've meant what teams they were originally on.
 * When the previously eliminated contestants laugh at Scott in response to Chris's remark, a harness from Truth or Laser Shark is seen on Mike.
 * In the same scene, Zoey's bracelets are absent.
 * When Cameron saved Anne Maria from Ezekiel, he threw the helmet Lightning had. But before Cameron stops Larry from eating Staci, Lightning is wearing his helmet when he says, "Quit being a hero and fight!"
 * After Cameron magnetizes Lightning's armor, Cameron's own armor too should be pulled towards Lightning as it is made from metal. Additionally, Lightning's necklace is seen being pulled away from his body.
 * In Cameron's ending, Lightning did not have a burnt skin, nor the other injuries on his face. But in his ending, those were all noticeable.
 * Dakota's legs stick out over her seat when in the peanut gallery. But when Chris introduces her, her legs are gone. They are back in the next scene.

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