Are you the key to solving a mystery? That question is at the heart of this all-new original series from Dateline. Correspondents Josh Mankiewicz and Andrea Canning report on perplexing missing person cases brought to Dateline's attention by our social media followers. Each episode will focus on one person's story, as told by those left behind. Listen carefully to the details, descriptions and clues offered by family, friends and investigators. Something you hear might jog a memory that could help authorities crack a case. Follow and subscribe now and join us for the first two episodes on July 26th.