For more than 25 years, "Dateline" has brought viewers investigations into some of America's greatest mysteries.

A nationwide search for the best home cooks in America. One of 50 hopefuls will become a culinary star and one of America's "Masterchefs."

A nationwide search for the best home cooks in America. One of 50 hopefuls will become a culinary star and one of America's "Masterchefs."

Four farmers and 32 women meet and mutually decide if any connections, love, or futures can be found, all while in their farm settings.

Four farmers and 32 women meet and mutually decide if any connections, love, or futures can be found, all while in their farm settings.

A televised poker cash game in which top pros including Sam Farha, Doyle Brunson, and Johnny Chan compete. This is not a tournament however, each player is playing with their own money and they have the option to buy in again.

A televised poker cash game in which top pros including Sam Farha, Doyle Brunson, and Johnny Chan compete. This is not a tournament however, each player is playing with their own money and they have the option to buy in again.

A few dozen home chefs battle it out in the Masterchef Kitchen to earn the best chef title, judged by top Australian chefs.

A few dozen home chefs battle it out in the Masterchef Kitchen to earn the best chef title, judged by top Australian chefs.

A single bachelorette dates multiple men over several weeks, narrowing them down to hopefully find her true love.