I just watched Hawaii Five-0 7×02 "No ke ali’i wahine a me ka ‘aina (For Queen And Country)" https://trakt.tv/shows/hawaii-five-0/seasons/7/episodes/2 #trakt
Five-0 must work with rogue MI-6 agent Harry Langford to find a terrorist planning to cause nuclear reactors across Europe to meltdown. Also, McGarrett and Danny ask retired FBI profiler Alicia Brown to help them find their serial killer vigilante.