Gabby Logan and Greg James present a fun, irreverent and uplifting countdown of the 50 greatest moments from the unforgettable London Olympics of 2012, featuring contributions from the likes of Usain Bolt, Jessica Ennis, Jimmy Carr, Reggie Yates, Andy Murray, Tom Daley, Mo Farah, Gary Lineker, Greg James, Cherry Healey and Mel C. We relive all the great sporting moments, such as 'Super Saturday', when Team GB won three gold medals in 45 glorious minutes, and also look back at some of the lighter moments of the games, including Her Majesty the Queen's show-stopping role in the opening ceremony and German diver Stephan Feck's painful backflop in the Aquatic Centre. It was the summer when everybody was doing the Mobot or growing their sideburns Wiggo-style. We all remember where we were when Andy Murray won gold at Wimbledon or when proud dad Bert le Clos became a star live on BBC Television. But what will come out on top as the greatest moment of London 2012?

A five-year-old Indian boy gets lost on the streets of Calcutta, thousands of kilometers from home. He survives many challenges before being adopted by a couple in Australia; 25 years later, he sets out to find his lost family.

After graduating from Emory University in 1992, top student and athlete Christopher McCandless abandons his possessions, gives his entire $24,000 savings account to charity, and hitchhikes to Alaska to live in the wilderness.

The story of a super-secret spy organization that recruits an unrefined but promising street kid into the agency's ultra-competitive training program just as a global threat emerges from a twisted tech genius.

As Lord Voldemort tightens his grip on both the Muggle and wizarding worlds, Hogwarts is no longer a safe haven. Harry suspects perils may even lie within the castle, but Dumbledore is more intent upon preparing him for the final battle fast approaching. Together they work to find the key to unlock Voldemorts defenses and to this end, Dumbledore recruits his old friend and colleague Horace Slughorn, whom he believes holds crucial information. Even as the decisive showdown looms, romance blossoms for Harry, Ron, Hermione and their classmates. Love is in the air, but danger lies ahead and Hogwarts may never be the same again.

101-year-old Rose DeWitt Bukater tells the story of her life aboard the Titanic, 84 years later. A young Rose boards the ship with her mother and fiancé. Meanwhile, Jack Dawson and Fabrizio De Rossi win third-class tickets aboard the ship. Rose tells the whole story from Titanic's departure through to its death—on its first and last voyage—on April 15, 1912.

A man with a low IQ has accomplished great things in his life and been present during significant historic events—in each case, far exceeding what anyone imagined he could do. But despite all he has achieved, his one true love eludes him.

Returning for his fifth year of study at Hogwarts, Harry is stunned to find that his warnings about the return of Lord Voldemort have been ignored. Left with no choice, Harry takes matters into his own hands, training a small group of students to defend themselves against the dark arts.

A small town girl is caught between dead-end jobs. A high-profile, successful man becomes wheelchair bound following an accident. The man decides his life is not worth living until the girl is hired for six months to be his new caretaker. Worlds apart and trapped together by circumstance, the two get off to a rocky start. But the girl becomes determined to prove to the man that life is worth living and as they embark on a series of adventures together, each finds their world changing in ways neither of them could begin to imagine.

Harry Potter has lived under the stairs at his aunt and uncle's house his whole life. But on his 11th birthday, he learns he's a powerful wizard—with a place waiting for him at the Hogwarts School of Witchcraft and Wizardry. As he learns to harness his newfound powers with the help of the school's kindly headmaster, Harry uncovers the truth about his parents' deaths—and about the villain who's to blame.

Young hobbit Frodo Baggins, after inheriting a mysterious ring from his uncle Bilbo, must leave his home in order to keep it from falling into the hands of its evil creator. Along the way, a fellowship is formed to protect the ringbearer and make sure that the ring arrives at its final destination: Mt. Doom, the only place where it can be destroyed.

Altruistic Jane finds herself facing her worst nightmare as her younger sister announces her engagement to the man Jane secretly adores.

Leonard Shelby is tracking down the man who raped and murdered his wife. The difficulty of locating his wife's killer, however, is compounded by the fact that he suffers from a rare, untreatable form of short-term memory loss. Although he can recall details of life before his accident, Leonard cannot remember what happened fifteen minutes ago, where he's going, or why.

U.S. Navy SEAL Chris Kyle takes his sole mission—protect his comrades—to heart and becomes one of the most lethal snipers in American history. His pinpoint accuracy not only saves countless lives but also makes him a prime target of insurgents. Despite grave danger and his struggle to be a good husband and father to his family back in the States, Kyle serves four tours of duty in Iraq. However, when he finally returns home, he finds that he cannot leave the war behind.

At the height of the First World War, two young British soldiers must cross enemy territory and deliver a message that will stop a deadly attack on hundreds of soldiers.

In Nazi-occupied France during World War II, a group of Jewish-American soldiers known as "The Basterds" are chosen specifically to spread fear throughout the Third Reich by scalping and brutally killing Nazis. The Basterds, lead by Lt. Aldo Raine soon cross paths with a French-Jewish teenage girl who runs a movie theater in Paris which is targeted by the soldiers.

Earl Stone, a man in his eighties, is broke, alone, and facing foreclosure of his business when he is offered a job that simply requires him to drive. Easy enough, but, unbeknownst to Earl, he's just signed on as a drug courier for a Mexican cartel. He does so well that his cargo increases exponentially, and Earl hit the radar of hard-charging DEA agent Colin Bates.

During the 1980s, a failed stand-up comedian is driven insane and turns to a life of crime and chaos in Gotham City while becoming an infamous psychopathic crime figure.

Two men wake up to find themselves shackled in a grimy, abandoned bathroom. As they struggle to comprehend their predicament, they discover a disturbing tape left behind by the sadistic mastermind known as Jigsaw. With a chilling voice and cryptic instructions, Jigsaw informs them that they must partake in a gruesome game in order to secure their freedom.

Eighties teenager Marty McFly is accidentally sent back in time to 1955, inadvertently disrupting his parents' first meeting and attracting his mother's romantic interest. Marty must repair the damage to history by rekindling his parents' romance and - with the help of his eccentric inventor friend Doc Brown - return to 1985.