Imagine being held down while you’re asleep by an unseen force, unable to move or scream for help. As many as 65 percent of people worldwide have experienced this, but is it a medical phenomenon or something darker? Plus, Dr. Oz goes into the field to investigate the filthiest public bathrooms to show you how to get in and out unscathed.

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!