THE WRONG MEDICINE - Dennis Quaid's newborn twins nearly died when they were mistakenly given a drug overdose. The actor and his wife share their story to draw attention to hospital mistakes that kill as many as 100,000 Americans a year. Steve Kroft reports. Ira Rosen is the producer.

THE SCIENCE OF SLEEP - Scientists are discovering that sleep is far more critical to human health than previously believed and have linked sleep deprivation to serious problems such as diabetes, obesity and heart disease. Lesley Stahl reports. Shari Finkelstein is the producer.