Ten killer couples. Their victims included spouses, children, classmates, and strangers.

In this long-form true crime documentary, Dark Exhibit examines ten relationships linked to the murders of other people. Each case asks how the two partners became involved, what evidence exposed their roles, and why their legal outcomes sometimes differed.

Cases featured, in order:

1. Ruth Snyder and Judd Gray
2. Martha Beck and Raymond Fernandez
3. Ian Brady and Myra Hindley
4. David and Catherine Birnie
5. Pamela Smart and William Flynn
6. Christa Pike and Tadaryl Shipp
7. Erika De Nardo and Omar Favaro
8. Heather Mack and Tommy Schaefer
9. Gypsy Rose Blanchard and Nicholas Godejohn
10. Lori Vallow and Chad Daybell

Some partners directly took part in a killing. In other cases, one helped plan, encourage, or facilitate it while the other carried out the attack. Investigators used confessions, witness accounts, recordings, financial records, messages, and physical evidence to establish what happened.

The victims and survivors remain central to these stories. Kate Moir’s escape, for example, helped police uncover the murders committed by David and Catherine Birnie. Across all ten cases, the documentary follows the people harmed, the investigation, and the courtroom outcome without treating the couples’ relationships as a romance to celebrate.

Subscribe to Dark Exhibit for long-form true crime documentaries about investigations, evidence, and the people affected by violent crime.

Content warning: discussion of murder, child victims, coercion, abuse, and sexual violence. Viewer discretion is advised.

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