The Secret Story of Stuff: Materials of the Modern Age

Since he was a teenager, Dara O Briain has been fascinated with professor Stephen Hawking, the world's most celebrated scientist. In this special film, Dara spends time with his boyhood hero as he attends the world premiere of The Theory of Everything, the movie made about his life, and then at Professor Hawking's home and place of work in Cambridge.

The Missing Years was a documentary containing footage from missing episodes of Doctor Who from William Hartnell's and Patrick Troughton's time as the Doctor. Presented by Frazer Hines and Deborah Watling, it was released on home video by BBC Video in 1998 and contained footage from several episodes.

The cast and crew discussing the transition from Tom Baker to Peter Davison, including exclusive behind-the-scenes footage of the regeneration.

Many incarnations of the Doctors and their old companions are taken out of time and deposited in the Death Zone on Gallifrey. There, they must battle the Master, Daleks, Cybermen and Yeti in order to reach the Dark Tower and discover the Tomb of Rassilon.

The cast and crew of I, Claudius (1976) discuss the making of the series.

A poet's tale of a day in the lives of the villagers of a Welsh fishing town of Llareggub.

Investigative reporter Terry Scanlon follows up the strange goings on in Llanfairfach, with interviews with people there at the time, including Professor Clifford Jones and mysterious boss, Stevens.

By the end of Tom Baker's tenure, the TARDIS crew had grown from the usual one companion to three. This featurette examines the reasons behind this change of direction.

This is one small step for a man, one giant leap for mankind." Commemorating the 40th anniversary of NASA's 1969 moon landing, this documentary uses news coverage from the BBC archives to recount the excitement of the historic event. Led by science reporter James Burke and astronomer Sir Patrick Moore, the BBC team captures all the drama of the momentous occasion, from the exhilarating takeoff to Neil Armstrong's unforgettable first step.

Retired commander of the United Nations' Intelligence Taskforce, and long-time associate of the mysterious time traveler the Doctor, Brigadier Alistair Lethbridge-Stewart faces the toughest battle of his military career when he is embroiled in a plot unwittingly set in motion by university chancellor Victoria Waterfield, herself a former companion of the Doctor, to take over the Earth by an evil alien entity called the Great Intelligence, aided by its ferocious robot Yeti cohorts. Can the Brigadier defeat this menace to the Earth without the Doctor's help?

Cast and crew discuss the making of The Sea Devils, from the television series Doctor Who.

Even a warrior as brave as Leela knows when it's time to leave the battlefield...

Bringing together key Out of the Unknown actors, directors and production team members for the very first time in order to explore the legacy and impact of the legendary series.

Continuing his search for inspiration, Zed resumes his studies of twentieth-century television's Doctor Who. What he finds will have a profound effect...

Blue Peter presenter Yvette Fielding takes Peter Davison, Mark Strickson and Janet Fielding on a trip through BBC Television Centre, meeting up with old friends and colleagues as they reminisce on their time spent working in the iconic building. With film traffic supervisor Neville Withers, assistant floor manager Sue Hedden, costume designer Odile Dicks-Mireaux, production assistant Jane Ashford, make-up artists Joan Stribling and Carolyn Perry, former BBC producer and writer Richard Marson, senior camera supervisor Alec Wheal, exhibitions assistant Bob Richardson and videotape engineer Simon Anthony.

The cast and crew of The Caves of Androzani look back on the making of a legendary story.