Is it possible to catch a mental illness, as you would the flu? Could Obsessive Compulsive Disorder be the result of an untreated strep throat infection? That's the provocative and controversial theory behind a childhood condition known as PANDAS - where young children suddenly develop OCD and severe tics almost overnight.  And if caught quickly, a simple course of antibiotics seems to reverse the symptoms immediately. But not all doctors accept the diagnosis. We'll have a documentary feature on this troubling condition and the questions surrounding it.

Plus - For planets in the Goldilocks zone, the bears might be home sooner than they thought.