BBC Four HD

Programmes start at 7.00pm.

Professor Ben Garrod explores how versatile the basic skin structure truly is, revealing how slight adaptations have created birds' feathers and a rhinoceros's horn.

It's a scorcher as Gareth Edwards and wife Maureen get to the seaside resort of Llandudno.

Scientists explore if the destructive impacts of asteroids on Earth four billion years ago may have provided the essential ingredients needed for life to ignite on our planet.

Writer Alan Bennett wanders through the architecturally exotic County Arcade in Leeds, designed by Frank Matcham in 1900.

Professor Brian Cox continues his tour of the solar system, revealing that it was once home to not one, but two blue planets.

Alison Steadman looks back at Dennis Potter's influential TV drama series The Singing Detective, once described by Stephen King as 'television's Citizen Kane'.

Marlow thinks back to his childhood and remembers seeing his mother having illicit sex. Contains some scenes of a sexual nature.

Dennis Potter's classic drama serial with music. Marlow as a child visits London, but is not impressed. A film option on Marlow's novel thickens the plot. Contains some strong language.