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FAMILY SECRETS AIRING ON "20/20," FRIDAY, FEBRUARY 6 ON ABC

When former White House Counsel J. Michael Farren learned of his wife's plans to divorce him, he beat her nearly to death in their Connecticut mansion. Mary Margaret Farren barely escaped with her life and her two young daughters. Now, in an exclusive "20/20" interview, Mary Margaret reveals to ABC's Amy Robach the harrowing details of her escape from domestic violence and the nearly deadly marriage. "20/20" airs on FRIDAY, FEBRUARY 6 (10:00-11:00 p.m., ET) on the ABC Television Network.

Plus: Catch Him If You Can... The young man's hospital badge said he was a physician's assistant at Osceola Hospital in Florida. He wore scrubs, a stethoscope, and examined patients while dropping medical terminology, even performing CPR on a patient who had overdosed. Months later, he was allegedly cruising South Beach in what looked like a police cruiser, stopping other drivers to tell them to put on their seat belts. But Matthew Scheidt was neither a physician nor a cop -- he was a fraud. After spending a year in jail, Scheidt is now telling his story to Matt Gutman for the first time, revealing the family secrets he says led him to his life as a young imposter.

"20/20" is anchored by Elizabeth Vargas and David Muir. David Sloan is senior executive producer.