Fascinating series which focuses on great feats of engineering.

Tonight’s show takes a look at skyscrapers, focusing on the building of these massive constructions and how the unsung heroes are not the architects but the structural engineers. Post 9/11, these structures must be built to withstand almost anything.

Changing rooms - BBC1, 8.30pm

Laurence Llewelyn-Bowen presents the interior design challenge and expects the worst when Linda Barker creates a cowboy-themed room for an unpredictable teenager in Derbyshire.

Meanwhile Gordon Whistance gives a dull dining room a Victorian facelift, and Handy Andy gets cooking.