U and YESTERDAY+1

Outside the town of Politz lie the ruins of what was once one of Germany's most important assets - a place that kept the German war machine moving.

When the Nazis took Ksiaz Castle, it wasn't for the view. Secret staircases and lifts were built, while underneath, a vast network of tunnels was taking form.

Built in 1934, Ordensburg Vogelsang, a virtual Nazi Castle was constructed with the intention of building the New German; elite future leaders of the Reich.

In 1933, Heinrich Himmler signed a 100-year lease for Wewelsburg castle in Buren, Germany. The space became a clandestine training space for the SS.

Allied forces stumble across a sprawling complex in the French countryside. What did the Nazis have planned for this mysterious Nazi stronghold.

Derek heads to Sunderland to pick up a real Italian beauty - a 1972 Lancia Fulvia Zagato. Red and racy, the car has seen better days but Derek's still impressed.

Up for sale at the Mathewson's auction is a 1275 Mini GT that's come from just down the road and could be a future British icon.

Derek goes to pick up a veteran 1904 Swift, there's an emotional farewell to a 1980s Bedford HA van, and a Toyota Corona finds a new home.

Engineering enthusiast Guy Martin recreates technical achievements of the 19th century and overhauls a steam locomotive currently in use on the Severn Valley Railway.

Engineering enthusiast Guy Martin renovates a sawmill in Wensleydale in North Yorkshire and then uses it to make a replica of the first pedal-powered bicycle.

Guy Martin turns a Land Rover Defender into a super-fast off-road racer capable of 100 miles per hour before going to Wales to race against the best in torrential rain.

Guy Martin bids to transform an ancient East German Trabant into a race car for a low-speed showdown at Brands Hatch - can he turn this Cold War slowcoach into a winner.

The Queen Elizabeth is being shadowed by Russian spy ships in the Mediterranean, testing her weapons and preparing her crew for what lies ahead.

HMS Queen Elizabeth sails into the eastern Mediterranean and runs the gauntlet of hostile Russian warships and jet fighters, and there is a tense stand-off.

Simon Reeve embarks on the first leg of an extraordinary four-part journey around the Mediterranean, travelling from Malta across the sea to southern Italy and on to Albania.

Setting off from a snowy mountain ski resort in Cyprus, Simon Reeve finds an island and a capital city still deeply divided between Turkish Cypriots and Greek Cypriots.

More wartime laughs in the saucy comedy set in occupied France. The Colonel tries to stop Von Flockenstoffen's kidnap plan. Fanny and LeClerc are stuck in a folding bed.

Another trip to the French cafe where the owner is always, 'ow you say, 'aving it away!' Sentenced to death by the Resistance, Rene tries to flee to England.