Secret Scotland, C5, 8pm

SUSAN Calman ends her odyssey on Orkney, beginning by sailing past famous sea stack the Old Man of Hoy. Then it’s on to another tourist attraction, the 5000-year-old settlement of Skara Brae, where she learns all about the home comforts of her neolithic ancestors. The Vikings also played an important role in the history of the islands, and Susan takes part in a traditional Viking feast. Across Scapa Flow, the comedian takes in the sight of a flotilla of scuttled Second World War ships, still visible above

the waves. At the Italian Chapel,

she hears a tale that moves her to tears.

Deutschland 86, More4, 9pm

THIS sequel to thriller Deutschland 83 continues to follow the fortunes of former East German secret agent Martin Rauch. Banished by the Stasi to work in an orphanage in Angola as punishment for mistakes made three years before, Rauch wallows in limbo, separated from his family and country. Eventually his aunt, Lenora Rauch, shows up and conscripts him into her latest plan, an arms deal. The pair set off on an adventure through Africa and Europe to East Germany.

Flight MH370 Five Years On: The Mystery Continues, C5, 9pm

ON March 8, 2014, Malaysia Airlines Flight 370 disappeared from radar screens and seemingly vanished off the face of the Earth while flying from Kuala Lumpur international airport in Malaysia to its destination, Beijing international airport in China. Many theories have since been proffered about its fate and that of the 239 people on board, but nothing concrete has emerged. This documentary charts the search for the aircraft, from teams using high-tech hydrophones to listen for the black box recorders to cutting-edge submersibles mapping the ocean floor for clues.

Gardeners’ World, BBC2, 8.30pm

MONTY Don and his team of horticultural experts return to offer viewers more gardening tips, including advice on how to plant spring flowering perennials for instant impact and recommendations for

planting bare root roses full of fragrance in borders and pots. Monty also begins planning the vegetable garden for the year ahead.