Survivor

ST. GEORGE -- Somewhere beneath the waters of the Virgin River -- perhaps even of Lake Mead more than 100 miles downstream -- lie the remains of two Boy Scouts killed 50 years ago in a flash flood that swept through the Zion National Park Narrows.

A skull fragment recovered from the river five years ago and believed to be from one of the flood victims is evidence of the passage of time since the deadly incident. Even now, the memory of that day in September 1961 doesn't rest easily for one of the survivors of the ill-fated trek undertaken by a wilderness expedition group called Socotwa.

Don't miss

"The Space Between" -- On the 10th anniversary of 9/11, the airwaves will be jammed with news coverage of the day's events, as well as in-depth commemorative programs, including "9/11: 10 Years Later" (7 p.m., KUTV Channel 2), "Making the 9/11 Memorial" (9 p.m., History), "The Twins of the Twin Towers" (7 p.m., OWN), and "Remembrance and Renewal: 10 Years After the 9/11 Attacks" (9 p.m., KTVX Channel 4). Not to be overlooked is this powerful film starring Oscar winner Melissa Leo as a flight attendant who suddenly finds herself serving as guardian to a 10-year-old Pakistani-American boy after their plane is grounded in Texas the morning of Sept. 11, 2001. When she discovers that his father works in the World Trade Center, they travel to New York City, learning lessons about tolerance, redemption and hope along the way. 10 p.m. Sunday, USA.