TWO OF HISTORY'S MOST FAMOUS HOMICIDES SERVE AS A BLUEPRINT WHEN HENRY AND JO BELIEVE THERE IS A COPYCAT KILLER LOOSE IN NEW YORK, ON ABC'S "FOREVER"

"The Frustrating Thing About Psychopaths" - When a human heart is delivered fresh out of a body to the homicide division, Henry and Jo end up in the middle of a Jack the Ripper copycat murder investigation. But it doesn't stop there. A second killing resembles another infamous, unsolved crime: the Black Dahlia murder. Henry has seen it all before, as flashbacks show his involvement with the two original cases from two very different periods of his long life. However, Henry's anonymous caller tips him to search beyond the clues of these classic killings and leads the police squad to profile a very different, yet disturbed suspect, on "Forever," TUESDAY, DECEMBER 30 (10:00-11:00 p.m., ET), on the ABC Television Network. (Rebroadcast. OAD: 10/21/14)

"Forever" stars Ioan Gruffudd as Henry, Judd Hirsch as Abe, Alana De La Garza as Detective Jo Martinez, Lorraine Toussaint as Lt. Joanne Reece, Donnie Keshawarz as Detective Hanson and Joel David Moore as Lucas.

Guest starring are Paul Fitzgerald as Mark, Rosalind Chao as Frenchman and Andy Murray as Abberline.

"The Frustrating Thing About Psychopaths" is written by Sarah Nicole Jones and directed by Zetna Fuentes.

"Forever" and is broadcast in 720 Progressive (720P), ABC's selected HDTV format with a 5.1 channel surround sound. This program carries a TV-14,V parental guideline.

For more information on "Forever," visit ABC.com/Forever.