Tennant’s team, along with NCIS agents Nick Torres and Jessica Knight, track The Raven’s whereabouts to the island of Oahu and learn about his plans to attack RIMPAC (The Rim of the Pacific Exercises), the world’s largest international maritime warfare exercise.
The crossover starts on NCIS S20E01 A Family Matter (I)
I’m watching NCIS: Hawai’i 2×01 “Prisoners’ Dilemma (II)” https://trakt.tv/shows/ncis-hawai-i/seasons/2/episodes/1