Alejandro and Duncan

The Alejandro-Duncan Conflict is about the conflict between Duncan and Alejandro.

Overview
This conflict begins when Duncan comes back in I See London..., when Alejandro isn't very pleased to see Duncan back in the game, because he perceives him as a threat. Alejandro tries to be friends with Duncan throughout the series until Chinese Fake-Out, when they become competitive about racing to the top of the Great Wall of China. Duncan and Alejandro do make an alliance in African Lying Safari to try to catch Ezekiel. However, in the end, Alejandro betrays Duncan to allay up with Heather instead. It seems that Duncan does know about Alejandro's tactics, but he never admitted it.

Celebrity Manhunt's Total Drama Action Reunion Special
Duncan, along with the other contestants from Total Drama come together to prevent Chris to create a new reality-show with Alejandro and the other Total Drama Dirtbags.

Walk Like An Egyptian - Part 2
Alejandro calls Duncan a quitter, when telling Courtney that she deserves better than Duncan.

Greece's Pieces
Alejandro, along with Tyler and Owen, votes Duncan off, and seems to get a bit angry when Chris says that Duncan is still in the game.

The Ex-Files
Alejandro knows Duncan is one of the strongest players of the show, so he plans to use Courtney against him. Later, Alejandro tells Duncan that he won't vote him off if Duncan saves him from the alien. He follows through with this and votes off Tyler instead of Duncan. Duncan also says Alejandro is "alright" in the confessional, once Alejandro hypnotizes Owen to sing "Take Me Out to the Ball Game".

Picnic at Hanging Dork
Duncan tells Alejandro to help him throw off Courtney's game by flirting with her, which will also throw Heather's game off as well, this just builds more on their friendship, though Duncan did say if Alejandro failed, he would vote him off. However, Alejandro knows that eventually it would backfire on Duncan, which happens after Gwen is eliminated instead of Courtney. Both of them share the common interest of making fun of Owen's misfortune.

Sweden Sour
Duncan confirms his thoughts about Alejandro after hearing about what Noah had revealed about him. Duncan then makes an alliance with Owen against Alejandro, and later explains in a confessional that he didn't trust Alejandro from the beginning and plans to fake a friendship with him until he can vote him out. During the challenge, both of them compete against each other to gain Owen's trust. Later, Duncan mocks Alejandro's manner of speaking and Alejandro blames Duncan for their boat mast collapsing, while Duncan takes to the idea of talking like a viking, Alejandro tells him to cut it out later.

Chinese Fake-Out
Duncan and Alejandro kept going neck-and-neck as the two race over on the Great Wall of China in order for one of them to win. They were close on making it, but later disappointed when it was discovered that Blaineley had made it through before them. After Heather discovers Blaineley cheating through the eating contests, Duncan also comments on Courtney helping Alejandro cheat. This causes both cheaters to lose and Sierra to win. Before voting someone off, Duncan inquires Alejandro about voting for Blaineley, instead of Heather.

African Lying Safari
Duncan and Alejandro team up for the challenge, but end up unconscious on the ground when Sierra and Heather hit them with tranquilizer balls. Then, Alejandro makes an alliance with Heather, which involves distracting Duncan so that they can win the challenge. Their plan prevails, and Alejandro tricks Duncan into getting attacked by Ezekiel. At the Barf Bag Ceremony, it is revealed that Duncan had two votes, confirmed in the next episode to be from Heather and Alejandro.

Hawaiian Style
Duncan cheers for Cody to win instead of Heather or Alejandro, despite Duncan's conflict with Cody.

Hawaiian Punch
Duncan is shown pleased and even compliments Heather's tactics when she knees him in the kiwis and slaps him down the volcano. He, along with everyone else, didn't bother to help Alejandro up after they trampled him.

Trivia

 * Both have a conflict with everyone.