It's something no "singleton" could understand - the mysterious bond between identical twins. From the world's largest meeting of multiples, to sisters separated at birth, we'll explore the age-old question of what shapes our identity: nature or nurture?

In this episode, Lisa Ling takes a close look behind the staggering statistics of incarceration in the African American community, and meets three men and families hoping to break the cycle once and for all.

Oprah re-lives one of the biggest "Oprah" show moments in television history: the day she gave away a brand new car to every person in her audience.

Music superstar Celine Dion returns to the "Oprah" show! Don't miss the TV debut of her miracle twins!

Three Boys and a New Show gives an intimate, never-before-seen look into the life of superstar C?line Dion, the birth of her twins, and her dedication to both her family and the opening of her Vegas spectacular.

A young doctor struggles with a procedure; a team performs two transplant surgeries simultaneously; a police officer is shot while on the job.