Only Connect: Season 21, Episode 25

21 - 25: Metrophiles v 5Ks

Victoria Coren Mitchell hosts the quiz where knowledge only gets you so far – the vital extra ingredients are logic and lateral thinking.It's the first of the semi-finals – the questions are tough, but so are the teams after surviving the gruelling earlier rounds.Arsenal, Ghetto, Lagoon, Lido – what's the connection between those four apparently random clues?