This is the last Round 1 match of Season One. There are three parts to this Season's finale. Part one is going to be considered one episode, while part two and three are going to be considered just one. So by default, this episode is going to have a huge lead due to being twice as long as a normal episode. All the summaries are from www.tvrage.com
Season One - Round 1 - Match 9
117. ...In Translation
When the raft the survivors have been building mysteriously burns down, Michael is convinced that Jin is responsible for the sabotage, which only serves to escalate their rivalry. Meanwhile, Sun stuns her fellow survivors with a surprising revelation, and Boone gives Sayid a warning about his step-sister Shannon. Lastly, more details of Jin and Sun's troubled marriage are revealed through flashbacks.
When Hurley becomes obsessed with the French woman and heads into the jungle to find her, Jack, Sayid and Charlie have no choice but to follow. Meanwhile, Locke asks Claire to help build a mysterious item, which is later revealed to be a cradle for Claire's baby. Hurley flashes back to the hugely life-altering experience he had before boarding the plane. He wins the lottery - the number-one thing Americans dream about - but it ends up being the worst thing that could have happened to him. The winning numbers, and their source, were apparently cursed and have brought harm to everyone Hurley loves. We learn some of the spooky story behind the numbers and their connection to the island.
Season One - Round 1 - Match 10
119. Deus Ex Machina
Locke thinks he's being sent a sign on how to get the hatch open, and he and Boone venture inland. Locke begins to have difficulties with walking as he and Boone try to find a way into the hatch. Jack is reluctant to offer assistance when Sawyer begins to experience excruciating headaches and needs glasses. In this episode we learn more about Locke's shocking and tragic encounter with his scheming biological parents. Lastly, as Locke confronts his troubled past and struggles to open the hatch, Boone is seriously injured after an accident involving a plane that the pair found in the forest.
120. Do No Harm
Jack tends to a severely wounded Boone after Locke returns him to the caves. Sun gives Jack some much-needed medical assistance and Sayid presents Shannon with a grand romantic surprise when they're alone. Claire unexpectedly goes into labor in the forest, Jack is unable to deliver the baby, and Kate, Charlie and Jin go into panic mode when they must tend to Claire themselves. Having returned Boone to Jack, Locke disappears back into the forest amid the chaos.
Season One - Round 1 - Match 11
121. The Greater Good
Jack goes after Locke for lying about Boone's accident whilst Shannon enlists the help of Sayid to avenge her brother's alleged murder. In Sayid's flashback, the CIA convince him to help them catch a suicide bomber.
122. Born to Run
Jack suspects foul play when Michael becomes violently ill while building the raft. Suspects include Sawyer and Kate, who compete for the last seat on the raft and do anything possible to prevent each other from getting it. Meanwhile, a secret from Kate's past is revealed to the other survivors on the island -- she is a runaway fugitive. The mysterious hatch is shown to Jack, who sides with Locke over Sayid in favor of opening it. Walt warns Locke not to open the hatch. Walt also admits to his father Michael that he burned the raft the first time, and changes his mind about leaving the island once he realizes Locke's plan for the hatch. Lastly, flashbacks of Kate's past reveal happier times with the "love of her life," Tom, prior to his death and a visit to her ill mother.
Season One - Round 1 - Match 12
123. Exodus (Part 1)
The French woman -- Danielle Rousseau -- shocks the survivors by showing up to the camp with a dire warning about "the others" who are on the island, and the black smoke that precedes them. Meanwhile, Michael and Jin ready the raft for sailing. Danielle takes Jack, Locke, Kate, Hurley, and Arzt on a trek to the Black Rock. However, once they reach the "Dark Territory," Arzt (who had previously gone back to camp) comes running with the real Beast hot on his heels. Fortunately, Locke's calm demeanor seems to ease the "security system," as Danielle calls it, and it heads in the other direction. They eventually reach the Black Rock, which turns out to be a wooden ship. Black smoke is an ominous sign as the raft sets sail after an accidental delay. Jin and Sun make up, and Walt decides to give the dog Vincent to Shannon since there is no room on the boat. Black smoke continues to rise.
124. Exodus (Part 2)
The castaways who make it onto the raft are surprised at sea by something that unexpectedly happens -- they make their first contact with "others" out at sea, but meet disastrous results. Meanwhile, remaining islanders attempt to blow open the hatch that's in the forest, but this proves to be more difficult than expected. Another survivor on the island dies. Visiting French woman Danielle Rousseau becomes a threat to Claire's infant son as she decides to kidnap him and bring him into the woods for "the others" to have in order to save the rest. Lastly, flashbacks show us all the survivors in the moments before the doomed flight took off.
My votes go to 118, 120, 122, 124. Happy Voting and may The Best Episode Win!