BBC Four HD

Programmes start at 7.00pm.

Dr Helen Czerski looks at the anatomy of an avalanche, from eyewitness footage from within one to detailed CT scans showing the microscopic changes that cause them.

Ben Robinson unlocks the ancient roots of the Northumberland village of Warkworth, discovering clues that point back almost 1,000 years to the Norman conquest.

Screen version of the classic television comedy about habitual prison inmate Norman Stanley Fletcher and his cellmate Lennie Godber.

Comic drama about a troubled professor struggling with writer's block. Contains very strong language.

Terry Wogan in conversation with actor and producer Michael Douglas, country music singer Glen Campbell, dress designer Jean Muir and actor Tom Hulce.