Beauty and the Beast season 1

A turning point was nine years ago in Catherine Chandler's life. She was there when her mother had been attacked and killed. Catherine herself was saved then by somebody unknown. After that she came to an important decision: her future job will be connected with homicide investigations.
Nine years past and now she is young and aspiring detective in NYPD and faces murders all the time. One investigation points her to Dr. Vincent Keller and very strange things uncover then. It was Dr. Vincent whom she must thank for staying alive 9 years ago. But what's more shocking, Cathrine finds out that it hadn't been a delusion when she saw a beast saving her, not the man. Nobody believed her nine years ago, but now Dr. Keller is a living proof - his DNA was changed during one human experiment he took part in when was in Afghanistan and after that he got the power to transform himself into a really powerful but wild creature - a real beast.