History Detectives SPECIAL INVESTIGATIONS, a new take on a PBS favorite, delves into the past this summer to explore some of America's most intriguing mysteries. Four episodes introduce the fresh perspective of a new detective and focus on a single story per hour. HDSI, the reformatted eleventh season of HISTORY DETECTIVES, debuts Tuesday, July 1-22, 2014, 9:00-10:00 p.m. ET on PBS. Also debuting on July 1 is TIME SCANNERS at 8:00 p.m.

In each episode of History Detectives SPECIAL INVESTIGATIONS, veteran detectives Tukufu Zuberi and Wes Cowan join forces with new host Kaiama Glover to probe a single iconic mystery from America's past. What was behind the tragic sinking of the SS Sultana, one of the worst maritime disasters in U.S. history, at the end of the American Civil War? Can the detectives solve the mystery of one of the country's first recorded serial killings, the Austin Servant Girl Murders of the 1880s? What led to the mysterious vanishing of big band leader Glenn Miller during World War II? Who killed Jimmy Hoffa -- and why?

The HDSI team brings modern forensic Science and cutting-edge tools to these historical conundrums. As they discover new evidence, sift through clues and crisscross the country in search of answers, they uncover fresh leads and information to tell captivating stories from a new angle.

"We're giving the History Detectives a broader mission this season," says Bill Gardner, Vice President of Programming and Development for PBS. "They're using modern technology to solve some of the toughest cold cases in U.S. history, and what they uncover is pretty surprising."

The hosts of History Detectives SPECIAL INVESTIGATIONS are:
· Wesley Cowan, independent appraiser and auctioneer;
· Tukufu Zuberi, professor of sociology and the director of the Center for Africana Studies at the University of Pennsylvania; and
· Kaiama Glover, professor of literature of the French-speaking Caribbean and sub-Saharan West African cinema at Barnard College, Columbia University.

Program descriptions:

History Detectives Special Investigations - Civil War Sabotage?
Investigate the sinking of SS Sultana, one of the worst maritime disasters in U.S. history.

History Detectives Special Investigations - Texas Servant Girl Murders
Follow the inquiry into a string of grisly unsolved murders in Austin, Texas, in 1885.

History Detectives Special Investigations - The Disappearance of Glenn Miller
Gather new information about what is perhaps the biggest mystery and cold case of World War II.

History Detectives Special Investigations - Who Killed Jimmy Hoffa?
Explore Teamsters president Hoffa's final days, with a window on the post-war era labor movement.

At 8:00 p.m. new three-part series TIME SCANNERS reveals physical and forensic mysteries of the ancient world's most iconic structures. Through cutting-edge technology that can "read" buildings, ruins and landscapes, this series allows viewers to reach out and touch the past. Hosted by Dallas Campbell ("Bang Goes the Theory"), a team of laser-scanning researchers from the University of Arkansas led by Steve Burrows, unlocks the secrets of the world's greatest engineering achievements. TIME SCANNERS airs Tuesdays, July 1-15, 2014, 8:00-9:00 p.m. ET