Gwen is reluctant to get involved when her old friend Andy asks for help investigating the disappearance of local teenager Jonah Bevin. But once the case gets under way, she realises that Jack has been suppressing reports of people vanishing in identical circumstances. The key to the mystery seems to lie in the rift - but even when Jonah is finally traced, there is still a shock in store for his distraught mother.
01. John Bevan - 00.27
At the start of Adrift, John Bevan is walking along Cardiff Barrage, which extends from Cardiff Docks to Penarth. This scene was filmed at the Penarth end. See Cardiff Harbour Authority's website for more information on the barrage.
02. Nikki Bevan - 01.00
Opposite the barrage, John sees his mum, Nikki, in their flat. The house is on Llwyn Passat, Penarth Marina. See the location map for the exact location.
03. Flat Holm - 25.23
A global positioning device, given by Ianto to Gwen shows Flat Holm, an island about 5 miles from Cardiff. The island is a local nature reserve, site of special scientific interest and a special protection area