Nearly 50 years since viewers first met a group of British seven-year-olds in Granada TV's 7 Up documentary, Michael Apted returns with another update to find out how their lives have changed. Now in their mid-50s, the participants - who include Andrew, Bruce, Jackie, Lynn, Neil, Paul, Sue, Symon and Tony - discuss the highs and lows of getting older, reveal whether they have achieved their ambitions and reflect on their appearances in previous instalments of the landmark series.