The mystery of the Loch Ness monster has captured people’s imaginations and enriched Scottish tourism since 1934, when the first grainy photograph, taken by surgeon Robert Wilson, hit the headlines.

There have been hundreds of reported sightings since and this documentary looks at some of the most elaborate fakes, including the infamous ‘three humps’ photo of 1951, which turned out to be hay bales.

We hear from scientists and psychologists, as well as die-hard Nessie hunters, including Roland Watson and Steve Feltham, on their enduring obsession with the creature from the deep sea.