Gary Lineker introduces coverage of tonight's Group A encounter between Switzerland and Turkey at the St Jakob Park Stadium in Basel, Switzerland (kick-off 7.45)

When the bones of a young girl are found outside a small town, everyone is convinced they belong to a teenage girl who went missing two years before when she was 16, but Nikki soon has other ideas.

Gwen has an encounter with an alien shapeshifter the night before her wedding.