Host Katherine Ambrose welcomes Dr. Sheldon Preskorn, board-certified psychiatrist, CEO of the Clinical Research Institute, and Professor of Psychiatry at the University of Kansas School of Medicine–Wichita, for a fascinating look at the history of Alzheimer's disease.

Abe and Richard struggle with British orders to dig up local gravestones. Ben and Caleb conspire to get their intelligence to General Washington.

Doc Martin: Paint It Black

Martin has his second GMC assessment - mock surgery - and Buddy is missing. Meanwhile, Ken's arrival does not bring good news for Al and Bert, and Penhale is unhappy with the arrival of his predecessor.

The featured Democrat candidates in tonight's debate are Ethan Corson, Cindy Holscher and Curt Skoog. Debates are also available online by clicking the date below.

Cathy’s triumph at CeCe’s turns dark when a club manager is found dead and Alphy is discovered in the depths of an illegal poker game. As Geordie uncovers a web of extortion, friendships fracture and faith falters.

Meet a brotherhood of Marines a decade after their deployment to Afghanistan, as they struggle to overcome the trauma of combat and the loss of many of their comrades, including their dear friend JV, who was killed in action by an IED.

When the Soviet Union falls, Russia welcomes US astronauts to their space station Mir. But co-operation between former the Cold War enemies is threatened by a run of disasters onboard.