The couple, holding hands, walk down a wooden dock by the water's edge, after spending an evening in a bar on the island of St John in the US Virgin Islands.
They are seen boarding a dinghy and motoring away into the darkness of the Caribbean Sea, headed for their luxury yacht, anchored in the next bay.
This CCTV footage - never made public before and released exclusively now to the BBC - contains the last-recorded sighting of British woman Sarm Heslop.
Some six hours later, she would be reported missing, feared lost at sea.
Ryan Bane, her boyfriend at the time, maintains she most likely fell overboard, or drowned while swimming, while he was sleeping. He has never been formally questioned by the police.
