First of this week's four editions of the drama series. Jake's plans for a day at the seaside are hijacked by an unexpected companion. Nat's friendship with Harry is severely tested. Nikki comes under pressure to tell her parents about her problems.
(Next episode tomorrow)
(For cast and credits see Thursday 5.10pm) (Repeat)
Followed by Rewind: 1970: I Am What Am
Camilla Hunsley tells the story of eight-year-old Christine Zapf's part in a successful campaign against makers of the disabling drug thalidomide.
(Repeated tomorrow morning on BBC2)