Dom ropes in Kay to help her gather evidence about Steve, and the pair trace him to a mysterious lock-up. Tevin piles on the pressure, and Kay gives Dom an ultimatum.

After being dismissed from MI5, Dom and Kay go their separate ways – but will new clues about a possible threat to the Notting Hill Carnival pull them back together?

Dom and Kay race to stop a looming threat at the Notting Hill Carnival, while a shocking twist reveals an unexpected enemy.