BBC Four HD SkyTV

...America Police the World?. 7/8. Obama warns the Syrian regime against considering using chemical weapons. Contains some violence and disturbing scenes. [S,AD] [HD]

2/5. In this very special episode of Inside Culture, Mary Beard meets former US Secretary of State, First Lady, senator and presidential candidate Hillary Rodham Clinton. [S] [HD]

3/3. The final episode sees Warhol as a man obsessed with money and security. Contains scenes which some viewers may find upsetting. [S] [HD]

10/10. Michael Portillo hears about the life and work of former riverboat captain Samuel Clemens, better known as Mark Twain. [S,AD] [HD]

...America Police the World?. 7/8. Obama warns the Syrian regime against considering using chemical weapons. Contains some violence and disturbing scenes. [S,AD] [HD]

Celebrating the 50th anniversary of a great Scottish landmark, the Forth Road Bridge. [S,AD,SL]

Programmes start at 7.00pm. [HD]

Programmes start at 7.00pm. [HD]

4/10. Monty Don visits the world's 80 best gardens. He visits South America, a continent twice the size of Europe with 50,000 endemic plants. [S,AD] [HD]

2/3. Richard Hammond investigates the role water plays in the weather. He tries to weigh a cloud, finds out how rain could crush a car and starts an avalanche. [S,AD] [HD]

3/3. Secret recordings expose corruption between cops and armed robbers. Contains some strong language. [S,AD] [HD]

As fans prepare for the arrival of series nine of the BBC's long-running crime drama Shetland, actor Alison O'Donnell takes an affectionate look back on the series. [S] [HD]

1/6. A severed hand washes up on a Shetland beach, sparking a complex murder investigation. Contains some strong language. [S,AD] [HD]

4/4. Travelling across Shetland, Ben Fogle meets people whose lives are rooted to these islands' history and visits a tiny church with big ideas. [S] [HD]