BBC Four HD

Programmes start at 7.00pm.

Michael Portillo explores the postwar Britain of his youth on a railway journey from the Midlands to the West Country, beginning in the city of Derby.

Paul Rose explores the soft and rolling south Devon coastline, where he takes a snorkelling trip around Burgh Island and hitches a ride on the Dartmouth to Paignton steam train.

Brian takes a fresh look at the concept of gravity, revealing it to be far more than just the force that makes things fall to the ground.

Bruce Parry sails to the island of Anuta, a remote tropical outpost in the South Pacific. Contains some scenes which some viewers may find upsetting.

Michael Palin shares memories of his 1988 screenplay for the drama Number 27 - one of his early post-Python solo ventures and written around the same time as East of Ipswich.

Ninety-year-old Miss Barwick has lived peacefully in the same house all her life, that is until a young property developer arrives at her front door. A play by Michael Palin.

Sam Willis shows how the castle arrived as an instrument of invasion with the Normans but became a weapon with which unruly barons challenged the Crown.