Dateline: Unforgettable

Season 2 Episode 18: A Promise to Helene

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.

Genre:

Crime, Documentary

Seasons:

8

Episodes:

128

Cast:

Quality:

HD

Duration:

84 min

First Air:

2021

Rating:

7.0