"If Only" (7 p.m., ABC Family): Samantha loves Ian. Ian's in love with Sam. But Ian, a sensible

"If Only" (7 p.m., ABC Family): Samantha loves Ian. Ian's in love with Sam. But Ian, a sensible young business executive (and Englishman to boot) somehow can't put his feelings into words. Sam feels spurned. Then the taxi she is riding in is struck by an oncoming car. In despair, Ian longs for another chance to let her know he cares. Presto! The next morning he awakens to find that second chance has been granted. Can he convey to Sam how he feels? Paul Nicholls ("Bridget Jones: The Edge of Reason") and Jennifer Love Hewitt ("Ghost Whisperer") are the couple whose love hangs in the balance in "If Only."
"It Could Happen Tomorrow" (9:30 p.m., The Weather Channel): The Weather Channel plays a game of what-if in a sobering new series called "It Could Happen Tomorrow" that forecasts the effects of possible natural disasters on major U.S. cities. The premiere episode, "New York City Hurricane," examines the devastation that would be caused by a Category 5 hurricane striking New York City. It profiles the potential fallout through computer simulations, interviews with experts and an examination of prior weather patterns. Subsequent episodes explore what would happen if an F-5 tornado tore through Dallas and how an eruption of Mount Rainer would affect nearby Seattle.