Valens partners with Rush to locate her abducted, drug-addicted sister, while Jeffries tries to bring justice to the case of a murdered teenaged girl that has haunted him for 17 years.

From standalone cases to season finales, Cold Case had a lot of fantastic episodes that still hold up 15 years after the police procedural ended.

"Cold Case Files Classic" Season 1 on Netflix brings some major unsolved mysteries onto the streamer—but other streaming services have the other five seasons of the A&E show.