Dateline: Unforgettable

A Promise to Helene

TV-14
S2 • E18    Nov 7, 2022    84m
7.9
A college student is found murdered and the case sits cold for nearly 40 years. Josh Mankiewicz reflects on the vow that keeps the case alive and the innovative method used to catch the killer.

Where to Watch A Promise to Helene

Cast of A Promise to Helene

  • Josh MankiewiczSelf - Correspondent

 

  •   
  •   
  •   
  •   
  •   
  •   
  •   

Take Plex everywhere

Watch free anytime, anywhere, on almost any device.
See the full list of supported devices