In 1519, the Spanish adventurer Hernan Cortes is supposed to have taken on the mighty Aztec empire with a handful of soldiers and sixteen horses after the Conquistadors started a civil war in Central America.

Comedian Alexander Armstrong always knew his family background was likely to be privileged, but he's keen to find out exactly how posh he is... Appropriately enough Alexander's journey begins with Burke's Irish Landed Gentry, a register of Britain's landed families. He quickly finds his own name listed under his mother's family name, McCausland, and decides to follow this line to find out more. Moving up the family tree he finds a relative who holds an honoured position in the Royal household of the day. Delving into more family papers, Alexander finds a letter from a direct ancestor over two hundred years ago, complaining about the shortcoming of her wastrel eldest son Edward. Alexander discovers that Edward inherits his baronetcy from a cousin and that foul play is suspected. Alexander's aristocratic roots are confirmed. Searching even further back following a fascinating trail of ancient documents Alexander finds out that he has even more titled relatives descended from one of the richest families in Britain and intimately connected to the King. One is a Royalist military leader during the Civil War, who ploughs all his money into the King's cause. But in a curious twist of fate he ends up being tried for High Treason and finishing his days in a most unexpected way.

Saatchi's six chosen artists are commissioned to produce large-scale pieces of art for the seaside resort of Hastings. They have two weeks and a limited budget to create work that appeals to the general public. For avant-garde contemporary artists this poses a considerable challenge. As they conceive and create their work, the artists receive advice and criticism from controversial Turner Prize-winning artist Martin Creed and art writer Matthew Collings. When their work is constructed on the seafront in Hastings, the artists come face-to-face with the public and have the pleasure of discovering what they think. The final judgment on the artists' success or failure is down to Charles Saatchi and his panel of advisors.

Heart-stopping drama and extreme conditions combine in this series about the emergency services in Scotland. This programme charts the challenges that the coastguard, mountain rescue and paramedics face in Scotland's Highland Emergency. Using innovative filming techniques and placing the audience at the heart of the action, this gritty show charts the unique challenges that the coastguard, mountain rescue, RAF search and rescue, paramedics and A&E teams have to face in one of the world's most inhospitable and isolated areas.

This programme illustrates not only the genetic similarities of twins, but also how similar decisions can be made independently by each twin. Gain a perspective into an intriguing world that can be different than expected.

Smallpox is the only virus that is eradicated. But stocks of the virus are still held by certain governments. This episode demonstrates what might happen if those sources were used as a weapon.

The artists embark on their second commission. This time they must create artwork to sit alongside the Old Masters at one of Britain's finest stately homes, Sudeley Castle. The owners of Sudeley, the Dent-Brocklehurst family, have agreed to allow the artists to remove objects and artwork from three rooms in their home and replace them with contemporary substitutes. The artists have one week to create their work, which then goes on display to Saatchi and an unsuspecting public. Saatchi believes that contempary art is often too focused on the present day, and that great art reinvents and reinterprets classic traditions for a modern audience. The Sudeley Castle commission is designed to see if the aspirant artists can achieve this.

Steve Leonard joins the team to rescue an orphaned baby orang-utan called Ellie. With her mother dead, she was being kept illegally as a pet. Traumatised, this little baby won't even eat or drink. Steve takes Ellie on the long journey back to the Borneo Orang-utan Survival Foundation's Centre - where her rehabilitation back to the wild can begin. Michaela Strachan joins Lone Droscher-Nielson (Director of the Centre) at the nursery. This is where the youngest orang-utans are looked after. Kesi is the biggest orang-utan in this group - she's been here longer than the others due to a disability. She lost a hand, probably from the same machete blow that killed her mother. With Steve and a dedicated team of babysitters, giving her round the clock love and attention, Ellie quickly settles in to her new home. She is also introduced to other orang-utans of her own age - and forms a special bond with one real character, Grendon. Michaela meets little Lomon, a new arrival who's carrying both the physical and mental scars of a very traumatised orang-utan. He was confiscated from a cage where he was chained up and probably beaten. It's touch and go as to whether he'll survive. Steve and the other vets are very worried as many of the orang-utans come down with flu. Most vulnerable are the youngsters in the nursery group. The team get a call, a wild orang-utan has been spotted wandering near a road - its forest home has just been destroyed. Steve joins the team for a very dramatic rescue. As the orang-utan flees up a tree, a highly-skilled marksman fires a dart. After being shot with an anaesthetic dart, the orang-utan must fall more than 50 feet into a net. Its touch and go as to whether the mission will succeed.

The architecture of ancient civilisations was dictated by the rocks that were accessible. Iain Stewart reveals how geology influenced the Egyptians, the Greeks and the Romans.

Neil Oliver continues his journey through the world of Ancient Britain as he encounters an age of cosmological priests and some of the greatest monuments of the Stone Age, including Stonehenge itself. This is a time of elite travellers, who were inventing the very idea of Heaven itself.

What will happen when a Dalek, a Klingon, a Cyberman, Ming the Merciless, Doctor Who (Colin Baker) and Darth Vader go head-to-head on the track? Driving the reasonably priced car is Jodie Kidd.