It was May 19, 2012 and a young and determined Canadian was proudly standing on top of the world after an agonizingly slow climb up Mount Everest. Shriya Shah-Klorfine had reached the summit. But in the hours that followed, things would go dreadfully wrong and she would perish, like hundreds before her, high up in Everest's "Death Zone." Since Edmund Hillary and Tenzing Norgay's first ascent of Everest almost 60 years ago, it has been an irresistible fascination for aspiring mountaineers. Hundreds make the attempt every year, and many don't make it. This year was no exception as hundreds made their way to the summit even as worrying signs pointed to trouble. Among them was Shriya Shah-Klorfine, the cheerful and energetic Torontonian. She had never climbed a mountain before, and despite warnings from her friends, husband, and seasoned Everest sherpas, she was climbing the world's highest peak, determined to succeed. In the season premiere, Bob McKeown travels to Nepal and pieces together what happened with exclusive never-before-seen video of Shah-Klorfine's final hours on Everest. the fifth estate uncovers startling new information about her deadly climb into the icy oxygen-thin expanse of Everest known as the Death Zone.

As the nearly 180-year-old Kingston Penitentiary that has housed some of Canada's most notorious inmates prepares to close its gates for good, Linden MacIntyre weaves together the stories of three of its most famous inmates. "Kingston Pen: Secrets and Lies" is the story of convicts trapped in a cycle of violence, of miscarriages of justice, and psychopaths of incredible charm.

Exclusive new revelations about the troubled F-35 program It could yet prove to be the most expensive defense purchase in Canadian history -- $25 billion and counting. The military promises it's the best fighter jet available, but some critics are saying it's a turkey hatched from a bad idea: a do-it-all plane that might not do anything well-at-all. Was Canada pressured to buy the F-35 fighter jet? Will the jet ever deliver on its promise of being the top gun in the sky? Did the government cover up the true costs to win an election? With secret documents and exclusive interviews with Air Force insiders, Gillian Findlay pieces together the troubling story of the F-35. From Lockheed Martin's first prototype and bungled development process to Canada's decision to buy the fighter jet without an open competition, "Runaway Fighter" raises serious questions about a procurement system seemingly run amok and a jetfighter critics say will never live up to its spin.

Family members say she preyed on the lonely, then married and buried them. Now the so-called Black Widow has been charged with attempted murder after the the suspicious sudden illness of another husband.

Diagnosed with ALS, one woman's public fight to meet death on her own terms. Gloria Taylor was the first Canadian ever to win the right to ask a doctor for help in dying, when and how and where she wished. "The Life and Death of Gloria Taylor" documents her struggle with mortality as she fights publicly to change the law over the course of what would be the last year of her life. Doomed by ALS (Lou Gehrig's Disease), Gloria Taylor became dependent on medical technology. Her fight for life was futile, and she could only hope for what she called a dignified ending. the fifth estate's Linden MacIntyre first met her more than a year ago as she battled with a disease that has no cure, and had just begun another struggle in British Columbia's Supreme Court to have the right to decide the time and manner of her death. She agreed to let the fifth estate follow her throughout that struggle, the private highs and lows, and the personal indignities throughout the final year of her life. In her many conversations with the fifth estate, Taylor maintained that she didn't want to kill herself and she didn't want anybody else to do it for her. It was just an option she wanted, a last resort. "The Life and Death of Gloria Taylor" chronicles her perseverance, her final victory in court, the backlash that threatened to take her victory away and in the end the peaceful death she had always wished for.

They have the courage to stand up and speak out when no one else dares, yet the popular perception of whistleblowers is they are doomed to be victims of reprisals. But when the fifth estate caught up with some of its more memorable whistleblowers, we found out their lives can take twists and turns no one ever expected. These cases offer an ironic insight into what was supposed to be a new era of transparency and integrity in Canada. To date, not a single case has been prosecuted under Canada's Public Servant Disclosure Protection Act, and the Public Sector Integrity Commissioner was dismissed in disgrace. It was the late '90s when the fifth estate first caught up with Drs. Shiv Chopra and Margaret Haydon. The two Health Canada scientists had serious concerns about a new synthetic drug that promised to transform dairy farming by increasing milk production in cows. Chopra and Haydon went public with their concerns and allegations that the manufacturer had offered regulators a bribe, and used questionable tactics as part of a campaign to get the drug approved in Canada. They would eventually both be both fired by Health Canada for insubordination and have spent years trying to get their jobs back. Bovine Growth Hormone was never approved in Canada. "To serve and protect." It's the motto of numerous police forces, and the declaration of duty which underpins the decision made by so many Canadians to take on a career in law enforcement. For as long as Victoria Cliffe can remember, she's known she wanted to be a police officer. But when she came forward to allege she'd been sexually harassed and assaulted by a superior officer, she became the target of a smear campaign. She's paid a high personal price for speaking out, but today she says she's still just as proud to wear the RCMP uniform. And a decade ago, Holly Brewer told the fifth estate an incredible story of a young girl pitted against her religion. Growing up as a Jehovah's Witness in New Hampshire, Bre

Lance Armstrong was an inspiration to millions - he overcame a deadly disease and was hailed as one of the world's greatest athletes - but insiders knew the truth. the fifth estate examines the widespread use and abuse of doping in international cycling and how Lance Armstrong kept this dark secret for years.

Two years ago, thousands of lives were lost and the landscape of Japan was changed forever by a tsunami that saw more than five million tonnes of debris swallowed up by the ocean. Mark Kelley reports on the Second Wave tsunami headed for Canadian shores, and a remarkable human drama that links our country with Japan.

He's been called a geo-vigilante, an eco-terrorist, or alternatively a visionary who simply wants to save the world. For years, American businessman Russ George has nurtured a controversial idea: to fix global warming by seeding the ocean with iron. Thumbing his nose at U.N. conventions and possibly Canadian law, George teamed up with a Haida village on B.C.'s West Coast and carried out the biggest iron fertilization project to date.

Cynthia Vanier had seemingly hit the big time in business, politics and international intrigue, working with Canada's largest engineering firm, SNC Lavalin, to protect billions of dollars worth of projects in Libya. That work led her to cross paths with one of the world's most notorious family names -- Gadhafi. But as events unfolded, she became a part of a fiasco so complex that she'll likely never fully understand it, nor recover from its impact on her life. On this week's the fifth estate, Linden MacIntyre tells the story of Cynthia Vanier and how she claims she was duped into a risky mission in Libya, and is now spending her days in a shabby prison in southern Mexico fighting allegations of terrorism, human trafficking and criminal conspiracy.

Bob McKeown hosts the fifth estate's sweeping cross-country investigation into Canada's hospitals and what they don't want you to know.