VIDEO: Sneak Peek - 'The Island' Episode of CBS's UNFORGETTABLE

On the next episode of CBS's UNFORGETTABLE 'The Island,' Carrie and Al's investigation into the death of a college dropout takes a surprising turn when they discover he had been living in an off-the-grid community on an abandoned island near Manhattan.

The episode airs Sunday, August 24 (9:00-10:00 PM ET/PT) on the CBS Television Network. Check out clips below!

UNFORGETTABLE stars Poppy Montgomery as Carrie Wells, an NYPD detective with a rare ability that makes her memory so flawless that every event she experiences is forever embedded in her mind, ready to be accessed at a moment's notice.  Feeling that her ability prevented her from leading a normal life, Carrie withdrew from police work for several years until she was unexpectedly reunited with her ex-boyfriend and partner, Detective Al Burns. After consulting on a case, Carrie decided that she belonged back on the job and joined Al in the Queens PD.  Carrie's memory helped her and Al close a staggering number of murder cases, which caught the eye of Eliot Delson, head of the Major Crimes Section of the NYPD.  Carrie and Al agreed to leave Queens to join Eliot's team in Manhattan, though Carrie forced him to bring on Joanne Webster, a brilliant medical examiner well known to Eliot for her acerbic personality.  Armed with her unique ability and backed up by the people she trusts the most, Carrie now helps protect the citizens of New York, and each case is more memorable than the last.