John Carter (film)

John Carter is a 2012 Science Fiction Adventure produced by Disney based on the Edgar Rice Burroughs A Princess of Mars, the first book of the Barsoom series. The film follows John Carter, a Confederate Civil War Veteran who while in Arizona after the American Civil War enters a cave that transports him to the planet Mars of which the natives call Barsoom and it's here that again finds a cause worth fighting for and a force that threatens the Earth.

Plot
In 1881, Edgar Rice Burroughs attends the funeral of his uncle, John Carter, a former American Civil War Confederate Army captain, who died suddenly. The body is put in a tomb unlockable only from the inside. The attorney executing the will hands Burroughs Carter's journal, which he reads, hoping to find clues about Carter's death and the reason he is the willed heir. The bulk of the film enacts what Burroughs reads.

While prospecting in the Arizona Territory in 1868, just after the Civil War, Carter is arrested by Union Colonel Powell, who seeks his help in fighting the Apache and insists that Carter owes it to his country (in short; attempted illegal conscription). Carter refuses, stating that any debt was paid when he lost his family. Carter escapes from his cell but is pursued by Powell and his cavalry. After encountering a band of Apaches, Carter and the wounded Powell take refuge in a cave, which turns out to be the object of Carter's earlier search: the "Spider Cave of Gold". A mysterious priestly being, a Thern, appears in the cave at that moment, and surprised by Carter's presence, immediately attacks him with a knife; Carter kills him but accidentally activates the Thern's powerful medallion, and is unwittingly transported to the ruined and dying planet of Barsoom, later revealed to be Mars, hundreds of millions of years in the past.

Due to Barsoom's low gravity and his own relatively high bone density, Carter is able to perform incredible jumps and feats of strength. He is captured by the Tharks, a clan of four-armed Green Martians led by their "Jeddak" (chieftain), Tars Tarkas. Tars instructs his loyal follower Sola to watch over Carter, leading to her feeding him a liquid that enables him to understand the Martians' language.

Elsewhere on Barsoom, the human Red Martian city of Helium, led by Thardos Mors, and the Walking City of Zodanga, led by the villainous Sab Than, have been at war for a thousand years. Sab Than, who wants to conquer all Barsoom, is armed with a special and highly destructive weapon given him by three Therns in the midst of a ship-to-ship close quarters combat, which the weapon ends by annihilating all the other participants. Than he proposes a cease-fire with Helium and an end to the war, sealed by marriage to Mors' daughter, the Princess of Helium Dejah Thoris. The unwilling Princess, disguised as a soldier, escapes in a Helium ship.

As Tarkas tries to get Carter to show off his jumping abilities, a Thark sentry spots a ship from Helium and another from Zodanga, and the Tharks scatter to hide. Carter races into action and leaps to save Dejah from falling. He kills some Zodangan soldiers and briefly fights with Than. Than's ship retreats and Carter is hailed by Tarkas as "Dotar Sojat" (roughly translatable as "My Right Arms"), for his strength and skill. Tarkas even grants him Dejah as part of the Thark spoils. Later, Carter, accompanied by Dejah, tries to find a way to get back to Earth, and stumbles upon a temple ruin sacred to the Tharks; Sola encounters them there and vainly tries to stop them from entering. They discover an inscription depicting a way to Earth in the sacred river of Iss, before Carter, Dejah, and Sola are caught by Tarkas' rivals Sarkoja and Tal Hajus. The three are sentenced to death according to the Thark code, but are helped to escape by Tarkas, who reveals to Carter that Sola is his daughter. Hajus and Sarkoja find the prisoners gone, and the ambitious Hajus declares that Tarkas has betrayed them.

Carter, Dejah, Sola, and Woola (a "Calot" - a large creature that resembles an amphibian and behaves like a loyal dog) embark on a quest to the end of the sacred river to find a way home for Carter. They discover clues to the "ninth ray", a means of accessing infinite energy and the key to understanding how the medallion works. They are attacked by the Green Martian Clan of Warhoon, who have been manipulated by Matai Shang, the leader of the Therns, to pursue them as part of Than's latest plan. After initially fleeing, Carter sends the others away and takes a stand, fighting the horde himself as atonement for being unable to save his own family. Though defeating many Warhoon, Carter is ultimately overpowered; he is saved when Mors intervenes in a Helium ship. Than is also in the company; Mors says that Than had come alone and had organized the rescue party. Dejah reluctantly agrees to marry Than and Carter is taken to Zodanga to be healed.

Upon awakening, Carter is led to Dejah's room. Dejah sends the servant girls away and gives Carter his medallion, telling him to return to Earth. As Dejah leaves with Than, Carter is met by Matai Shang, who takes Carter prisoner and walks him around Zodanga. In different Zodangan forms, Shang explains to Carter the Therns' purpose, how they manipulate the civilizations of various planets into self-destruction. He also reveals Than's secret plan to kill Dejah once he marries her and to destroy Helium and rule Barsoom, so completing the course the Therns have set for the planet. Shang also reveals that he and the Therns had been doing this for millions of years, and implies that Earth is their next target. Carter escapes thanks to Woola, and he and Sola return to the Tharks to request their help. There, they discover Hajus has overthrown Tarkas. Tarkas, Carter, and Sola are thrown into an arena to be killed by two enormous four-armed Great White Apes. Carter defeats them and then challenges and easily kills Hajus, so becoming Jeddak of the Tharks.

Carter and his Thark army charge on Helium and defeat the Zodangan army in a huge battle, while Than is killed by Shang before revealing anything more about the Therns to Carter. With the Therns' course they have set for Mars permanently foiled, Shang is forced to escape in the chaos of the battle and leave Mars forever. Dejah and Carter marry and he becomes Prince of Helium. On their first night, Carter decides to stay on Mars forever, and throws away his medallion. Seizing this opportunity, Shang, in the form of a Helium guard, appears instantly and sends Carter back to Earth, trapping him there and away from Mars.

Back on Earth, Carter concludes that there may be other Thern "Way-stations" like the "Spider Cave of Gold", and embarks on a long quest for clues of the Therns' presence on Earth and hoping to find one of their medallions; after ten years, he appears to die suddenly and requests his unusual funeral arrangements — consistent with his having found a medallion, since his return to Mars would leave his Earth body vulnerable in a coma-like state. He leaves Burroughs clues about opening the tomb.

The film reverts to the original timeline. Burroughs races to Carter's tomb and opens it, expecting to find Carter's body. A Thern, in the form of a man with a bowler hat (who has been shadowing Carter for some time), appears behind Burroughs holding a weapon with which to destroy the body. Both are taken aback to see the tomb empty. A shot rings out and the Thern drops dead. Carter emerges and confesses to Burroughs that he never found a medallion. Instead, he had devised a scheme to lure a Thern in order to get its medallion. Carter reiterates to Burroughs that his body on Earth needs protecting and recommends that Burroughs enjoy his life on Earth, to fall in love and to write books. He then takes the Thern's medallion, whispers the code, and is transported back to Barsoom and Dejah.