Nikki and Jack hunt a suspected hitman across Birmingham, wholater claims responsibility for a murder that gripped thenation, for which someone else is serving time in jail.
After being dismissed from MI5, Dom and Kay go their separateways - but will new clues about a possible threat to theNotting Hill Carnival pull them back together?
A mysterious death at a Bhangra dance competition - and apromise from the killer that there will be more - leads theteam into a series of sinister revelations.
Matt revs his love life back up only to find the road rockierthan expected. Meanwhile, a chance romantic moment has Rileyand Gabe questioning the nature of their relationship.