THE best of today's TV

Ancient Invisible Cities (BBC2, 9pm)

IN Turkey, Michael Scott uses 3D-scanning technology to examine the once enormous Hippodrome, which began as a stadium for chariot racing, though its foundations were later converted into a huge water cistern to supply the Emperor's Great Palace.

Michael unearths a holy well, hidden 30 feet under a carpet shop and, conversely, walks high above the city on the most sophisticated and longest aqueduct of the Roman world, finding that part of the Great Palace of Constantine is now a burnt-out shell. Along the way Michael finds time for a shave in the Sultan's Grande Bazaar and uncovers the engineering innovations of the Suleymaniye Mosque. Last in the series.

The Island Strait (ITV, regions vary)

THINK of the Menai Straits and what immediately springs to mind is probably the bridge that links Anglesey to mainland Wales, which was designed by Thomas Telford, completed in 1826 and is now a Grade I listed building.

It was originally built to help landowners take their valuable cattle to market in London, but these days it's more likely to transport tourists to the island for their holidays - as the latest edition of this series illustrates perfectly. As the tourists arrive, local businesspeople thrive - suddenly their tills are constantly ringing thanks to the temporary residents. Some of the sights they come to see may include landscape photographer Glyn's exhibition and Menai, the Olive Ridley turtle who washed up outside Frankie's Sea Zoo and is now thriving in her new home.

Gardeners' World (BBC2, regions vary)

MONTY DON celebrates fruits of the season by planting crab apples in his paradise garden and bulbs in pots for early spring colour.

Carol Klein travels to Yorkshire where she takes a look at the enormous colour range and form of the late-season perennial the salvia, while Mark Lane is in Oxfordshire looking at how ornamental grasses can be used in planting design to create exciting combinations. Arit Anderson tackles growing concerns about the use of plastics in the horticultural industry and Environment Minister Michael Gove is quizzed about government plans for improving recycling.

Britain by Bike with Larry & George Lamb (C5, 8pm)

THE father-and-son duo tackle the Hebridean Cycle Way.

In Eriskay, George hooks up with the local football team and has a kick-about in some wild weather on one of the most picturesque pitches in the world. Meanwhile, Larry joins a local landowner and his deerstalker in an effort to spot the magnificent deer who roam the region. After staying overnight at Amhuinnsuidhe Castle, the pair cycle up to Lewis and Harris, swinging into Stornoway to sample some local black pudding. They later meet members of the Lewis Pipe Band who instruct the boys in the art of the bagpipes. Last in the series.

Walking Britain's Lost Railways (C5, 9pm)

ON Thursday, Rob Bell talked Channel 5 viewers through the history of HMS Victory: Nelson's Great Warship, but tonight he's putting on his walking boots for this new series.

It finds him revisiting lines decommissioned in the 1960s and celebrating the new life that has been created from their remains. He begins his quest in Scotland, journeying along the old route from Elgin to Portsoy, a line that served the fishing and whisky industries. Rob wonders at the formidable Elgin station, which still stands strong, before tracking the line along the coast. Lossiemouth once saw sherry barrels aplenty and vast quantities of fish along its route, and the picturesque docks still betray the presence of steel track right up to the water's edge.

Can You Feel It: How Dance Music Conquered the World (BBC4, 10pm)

YOU don't have to head to the club to feel the influence of dance music - from the charts to TV advertising, we're surrounded by 4/4 tunes made or remixed by superstar DJs.

This documentary takes a look at how the genre took over, from dance music's disco origins via house, techno and acid house all the way to today's EDM explosion. The impressive list of contributors includes pioneers like Farley "Jackmaster" Funk, Steve "Silk" Hurley and Kevin Sanderson as well as the all-conquering David Guetta.