"The Frustrating Thing About Psychopaths" is the sixth episode of Forever. It aired on October 21, 2014.
"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."
- Rosalind Chao as Frenchman
- Paul Fitzgerald as Mark
- Andy Murray as Abberline
- Burn Gorman as Adam (uncredited)
- "Murder is never an easy thing to look at. When you examine the body of a victim, you don't see the reflection of their life, but the person who took. You see whether the killer felt anger or betrayal...or worse...if they felt nothing at all." —Henry
- "You can tell a lot by looking in a persons eyes." —Henry to Mike
- "We may never understand those who kill so easily for spectacle. But perhaps that's why we're so fascinated with them. We read about their exploits out of curiosity. Our fascination with the macabre makes it all seem unreal. But the truth that everyone has the capacity to kill. The real question is, how do you live with yourself afterwards?" —Henry
- "I'm glad you're feeling so awful. You must allow yourself to feel the pain, the guilt, the shame. The day when killing another person doesn't affect you, that's when you got real problems." —Henry to Jo about killing someone
- Episode recap at Forever official website – archived from the original on April 29, 2015
- Episode at IMDB
- Watch this episode on CW Seed
- Listings, TheFutonCritic.com