ABC's 20/20 Airs 'Mysteries of the Castle: Beyond Downton Abbey' Tonight

"Mysteries of the Castle: Beyond Downton Abbey" is a behind-the-butler look at the Downton Abbey world from inside the real-life English Castle that inspired the cult series. A special edition of 20/20, "Mysteries of the Castle: Beyond Downton Abbey," is anchored by Amy Robach. The show airs tonight, December 26, 9:00 p.m., ET

ABC News' acclaimed series "20/20" has distinguished itself as one of the most esteemed news programs in broadcast journalism. Amid the heated, competitive environment of Primetime entertainment, "20/20" has demonstrated its ability to consistently attract a significant segment of the viewing audience by offering viewers more choices and more chances to learn about the world around them.

For over three decades, "20/20" has continued to combine hard-hitting investigative reports, newsmaker interviews and compelling human interest and feature stories that have changes lives.

The program is co-anchored by the broadcast team of Elizabeth Vargas and Christopher Cuomo, both award-winning journalists.