Irrepressible writer-comedian Carl Reiner, who shows no signs of slowing down at 94, tracks down celebrated nonagenarians, and a few others over 100, to show how the twilight years can truly be the happiest and most rewarding. Among those who share their insights into what it takes to be vital and productive in older age are Mel Brooks, Dick Van Dyke, Kirk Douglas, Norman Lear, Betty White and Tony Bennett.

Carrie Watts is living the twilight of her life trapped in an apartment in 1940’s Houston, Texas with a controlling daughter-in-law and a hen-pecked son. Her fondest wish — just once before she dies — is to revisit Bountiful, the small Texas town of her youth which she still refers to as “home.”